
【预售 按需印刷】Knowledge management practices from a cul 北京发货,付款后10天内发货
¥106.00

【预售 按需印刷】Knowledge Management 北京发货,付款后10天内发货
¥135.00

【预售 按需印刷】Knowledge Management and Organisational L
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【预售 按需印刷】Knowledge Management 北京发货,付款后10天内发货
¥197.00

【预售 按需印刷】Knowledge Management as Key Factor in Pro
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【预售 按需印刷】Knowledge Management Action Plan 2021-2025
¥272.00

【预售 按需印刷】Knowledge Management 北京发货,付款后10天内发货
¥316.00

【预售 按需印刷】Knowledge management Innovation in the Kn
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【预订】Knowledge Management Initiatives in Singapore 9789814467 美国库房发货,通常付款后3-5周到货!
¥364.00

【预售 按需印刷】Knowledge Management (Km) Processes in Or
¥368.05

【预订】Knowledge Management: Linchpin of Change 9780851424149 美国库房发货,通常付款后3-5周到货!
¥376.00

【预订】Knowledge Management and Risk Strategies 9789812568908 美国库房发货,通常付款后3-5周到货!
¥371.00

【预订】Knowledge Management 9781843340379 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781843340379 Author 作者 Al-Hawamdeh, Suliman Format 版本 平装-胶订 Pages Number 页数 222页 Publication Date 出版日期 2003-10-31 Product Dimensions 商品尺寸 9.2 x 6.1 x 0.5 cm Shipping Weight 商品重量 370g Language 语种 英语 Book Contents 内容简介 Information / Knowledge Management
¥420.00

【预售 按需印刷】Knowledge Management and Project Based Le
¥438.60

【预售 按需印刷】Knowledge Management, Trust and Communica
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¥452.20

预订 Knowledge Management 国外库房发货,通常付款后3-5周到货
Product Details 基本信息 ISBN-13 书号 9781032428024 Author 作者 Becerra-Fernandez Format 版本 平装-胶订 Pages Number 页数 388页 Publisher 出版社 Routledge Publication Date 出版日期 2024-02-23 Product Dimensions 商品尺寸 246 x 174 mm (6.85 x 9.69 Shipping Weight 商品重量 1.41磅 Language 语种 其它(含多语) Book Contents 内容简介 Knowledge Management: Systems and Processes in the AI Era, Third Edition, is aimed at students and managers who seek detailed insights into contemporary knowledge management (KM). It explains the concepts, theories, and technologies that provide the foundation for knowledge management; the systems and structures that constitute KM solutions; and the processes for developing, deploying, and evaluating these KM solutions. This book serves as a complete introduction to the subject of knowledge management, incorporating technical and social aspects, as well
¥527.00

【预售 按需印刷】Knowledge Management in Indian Higher Edu 北京发货,付款后10天内发货
¥1097

【预订】Knowledge Management 9781599049335 国外库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781599049335 Author 作者 Murray E. Jennex Format 版本 精装 Pages Number 页数 4235页 Publisher 出版社 IGI Publishing Publication Date 出版日期 2007-09-30 Product Dimensions 商品尺寸 Language 语种 其它(含多语) Book Contents 内容简介 Knowledge Management: Concepts, Methodologies, Tools, and Applications is the defining reference source for all theories, concepts, and methodologies within the knowledge management (KM) discipline. This comprehensive, six-volume collection of research from an international body of KM experts includes chapters on implementing KM in organizations; KM systems acceptance; KM communication; knowledge representation; knowledge sharing; KM success models; knowledge ontology; and operational KM. Encompassing 281 chapters from 432 contributors drawn from the world’s leading KM experts, Knowledge Management: Concepts, Methodolog
¥16679

【预订】Knowledge Management in Hospitality and Tourism: 美国库房发货,通常付款后3-5周到货!
¥1507

【预订】Knowledge Management for Competitive Advantage During Ec 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781466664579 Author 作者 Patricia Ordo?ez de Pablos Format 版本 精装 Pages Number 页数 364页 Publisher 出版社 Business Science Reference Publication Date 出版日期 2014-09-30 Language 语种 英语 Book Contents 内容简介 Strategy management has always been a crucial business aspect that a company must understand to remain successful in the business world. However, there are a number of different approaches that a company can employ in order to differentiate themselves from the competition.Knowledge Management for Competitive Advantage During Economic Crisis brings together the various approaches that affect the superiority of a company’s organizational performance and the gains they can make over their competitors. By focusing on concepts such as organizational learning and intellectual capital, this book is an indispensable reference source for researchers, practitione
¥1669

【预订】Knowledge Management and Engineering with Decisional DNA 国外库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9783030396039 Author 作者 Szczerbicki Format 版本 平装-胶订 Pages Number 页数 248页 Publisher 出版社 Springer Berlin Heidelberg Publication Date 出版日期 2021-05-02 Product Dimensions 商品尺寸 9.2 x 6.1 x 0.5 cm Shipping Weight 商品重量 830g Language 语种 英语 Book Contents 内容简介 This is the first book on experience-based knowledge representation and knowledge management using the unique Decisional DNA (DDNA) technology. The DDNA concept is roughly a decade old, and is rapidly attracting increasing attention and interest among researchers and practitioners. This comprehensive book provides guidelines to help readers develop experience-based tools and approaches for smart engineering of knowledge, data and information. It does not attempt to offer ultimate answers, but instead presents ideas and a number of real-world case studies to explore an
¥1095

【预订】Knowledge Management and Intelligent Enterprises 美国库房发货,通常付款后3-5周到货!
¥1053

【预订】Knowledge Management: Competencies and 美国库房发货,通常付款后3-5周到货!
¥1697

【预售 按需印刷】Knowledge Management and Virtual Organiza
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【预订】Knowledge Management Systems in Law Enforcement 97815990 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781599043074 Author 作者 Petter Gottschalk Format 版本 精装 Pages Number 页数 335页 Publisher 出版社 Idea Group Publishing Publication Date 出版日期 2006-07-31 Language 语种 英语 Book Contents 内容简介 Police forces around the world engage in a variety of activities. Many of these activities, such as roadblocks, arrests, and increased police presence in problem areas, are reactive, but there are also many proactive measures involved in police work. Both reactive and proactive measures involve a large amount of information, and police officers need to understand vast amounts of knowledge to carry out their normal duties. This amount of information means that police officers also have to be proficient knowledge workers.Knowledge Management Systems in Law Enforcement: Technologies and Techniques presents the latest research and trends in using knowledge management to ai
¥806.00

【预订】Knowledge Management Strategies 9781599046037 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781599046037 Author 作者 Miltiadis D. Lytras Format 版本 精装 Pages Number 页数 390页 Publisher 出版社 IGI Publishing Publication Date 出版日期 2008-04-30 Language 语种 英语 Book Contents 内容简介 We recognize knowledge management as a socio-technical phenomenon where the basic social constructs such as person, team, and organization require support from information communication technology applications. In an era of business transition, the effective management of knowledge is proposed as a strategy that effectively utilizes organizational intangible assets.Knowledge Management Strategies: A Handbook of Applied Technologies provides practical guidelines for the implementation of knowledge management strategies through the discussion of specific technologies and taxonomies of knowledge management applications. A critical mass of some of the most sought-after research
¥849.00

【预订】Knowledge Management In Innovative Companies 2 - Underst 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781786305053 Author 作者 Pierre Saulais Format 版本 精装 Pages Number 页数 220页 Publisher 出版社 Wiley-ISTE Publication Date 出版日期 2020-05-04 Language 语种 英语
¥2020

【预订】Knowledge Management, Innovation, and Entrepreneurship i 国外库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781799823568 Author 作者 Murray Eugene Jennex Format 版本 平装-胶订 Pages Number 页数 300页 Publisher 出版社 Business Science Reference Publication Date 出版日期 2020-03-27 Language 语种 英语 Book Contents 内容简介 In today’s world of business, gaining an advantage of competitors is a focal point for organizations and a driving force in the economy. New practices are being studied and implemented constantly by rivaling companies. Many industries have begun putting emphasis on intensive knowledge practices, with the belief that implementing cutting-edge learning practices will fuel research and innovation within the company. Understanding this dynamic method of management is critical for managers and executives who wish to propel the success of their organizations. Knowledge Management, Innovation, and Entrepreneurship in a Changing World is a collection of pionee
¥2158

【预订】Knowledge Management and Innovation in Network Organizat 国外库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781522588559 Author 作者 Jerzy Kisielnicki Format 版本 平装-胶订 Pages Number 页数 187页 Publisher 出版社 Business Science Reference Publication Date 出版日期 2018-07-06 Language 语种 英语 Book Contents 内容简介 Organizations of all types are consistently working on new initiatives, product lines, or implementation of new workflows as a way to remain competitive in the modern business environment. No matter the type of project, employing the best methods for effective execution and timely completion of the task at hand is essential to project success. The implementation of computer technology has provided further opportunities for innovation and progress in the daily operations and initiatives of corporations. Knowledge Management and Innovation in Network Organizations: Emerging Research and Opportunities is an essential scholarly resource that explores the use of
¥1224

【预订】Knowledge Management for Health Care Procedures: 美国库房发货,通常付款后3-5周到货!
¥548.00

【预订】Knowledge Management 9781843341222 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781843341222 Author 作者 Handzic, Meliha Format 版本 平装-胶订 Pages Number 页数 172页 Publication Date 出版日期 2005-05-31 Product Dimensions 商品尺寸 9.2 x 6.1 x 0.3 cm Shipping Weight 商品重量 310g Language 语种 英语 Book Contents 内容简介 Information / Knowledge Management
¥550.00

【预订】Knowledge Management in Higher Education 美国库房发货,通常付款后3-5周到货!
¥1112

【预订】Knowledge Management in Emerging Economies 9781616928865 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781616928865 Author 作者 Minwir Al-Shammari Format 版本 精装 Pages Number 页数 424页 Publisher 出版社 Information Science Publishing Publication Date 出版日期 2010-09-30 Language 语种 英语 Book Contents 内容简介 Knowledge is evolving in the new economy as a distinctive core competency and as a main source of wealth for many countries as well as companies. Managing knowledge as a non-depleting corporate resource can help in the creation of sustainable competitive advantage for today’s competitive and globalized business world.Knowledge Management in Emerging Economies: Social, Organizational and Cultural Implementation seeks focuses on knowledge management theoretical models and empirical research findings for developing economies. This book specifically seeks to understand the social, organizational, and cultural implementation aspects of knowledge management in th
¥1539

【预订】Knowledge Management in Fuzzy Databases 9783790812558 国外库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9783790812558 Author 作者 Pons Format 版本 精装 Pages Number 页数 null页 Publisher 出版社 Physica-Verlag Publication Date 出版日期 1999-11-17 Product Dimensions 商品尺寸 24 x 15.8 x 2.8 cm Shipping Weight 商品重量 0.7 kg Language 语种 其它(含多语) Book Contents 内容简介 1. When I was asked by the editors of this book to write a foreword, I was seized by panic. Obviously, neither I am an expert in Knowledge Representation in Fuzzy Databases nor I could have been beforehand unaware that the book’s contributors would be some of the most outstanding researchers in the field. However, Amparo Vila’s gentle insistence gradually broke down my initial resistance, and panic then gave way to worry. Which paving stones did I have at my disposal for making an entrance to the book After thinking about it for some time, I concluded that it would be pre
¥1643

【预订】Knowledge Management and Industry 4.0: New Paradigms for 国外库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9783030435912 Format 版本 平装-胶订 Pages Number 页数 206页 Publisher 出版社 Springer Publication Date 出版日期 1800-01-01 Product Dimensions 商品尺寸 9.2 x 6.1 x 0.4 cm Shipping Weight 商品重量 690g Language 语种 英语
¥1643

【预订】Knowledge Management and Organizational Competence 97801 美国库房发货,通常付款后3-5周到货!
¥700.00

【预订】Knowledge Management Techniques for Risk Management in I 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781522583899 Author 作者 Muhammad Noman Riaz Format 版本 精装 Pages Number 页数 121页 Publisher 出版社 IGI Publishing Publication Date 出版日期 2019-02-28 Language 语种 英语 Book Contents 内容简介 There are many risks associated with IT projects that have the potential to threaten the success of the project at any stage of its development life cycle. By seeking commonalities between knowledge management and risk management, a way by which they can be integrated together to reduce these risks can be determined. Knowledge Management Techniques for Risk Management in IT Projects: Emerging Research and Opportunities is a collection of innovative research that examines the tools and techniques of knowledge management and integrates them with risk management techniques for better analysis of risks that can occur in different stages of IT projects. While highlighting topics
¥1156

【预订】Knowledge Management and Engineering with Decisional DNA 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9783030396008 Author 作者 Edward Szczerbicki Format 版本 精装 Pages Number 页数 248页 Publisher 出版社 Springer Berlin Heidelberg Publication Date 出版日期 2020-05-19 Language 语种 英语 Book Contents 内容简介 This is the first book on experience-based knowledge representation and knowledge management using the unique Decisional DNA (DDNA) technology. The DDNA concept is roughly a decade old, and is rapidly attracting increasing attention and interest among researchers and practitioners. This comprehensive book provides guidelines to help readers develop experience-based tools and approaches for smart engineering of knowledge, data and information. It does not attempt to offer ultimate answers, but instead presents ideas and a number of real-world case studies to explore and exemplify the complexities and challenges of modern knowledge engineering issues. It also incre
¥1095

【预订】Knowledge Management: Linchpin of Change 9781138439436 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781138439436 Author 作者 Webb, Sylvia P Format 版本 精装 Publication Date 出版日期 2017-06-28 Language 语种 英语
¥2637

【预订】Knowledge Management Primer 美国库房发货,通常付款后3-5周到货!
¥2713

【预订】Knowledge Management 9781843342663 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781843342663 Author 作者 Benbya Format 版本 平装-胶订 Pages Number 页数 318页 Publisher 出版社 Chandos Publishing Publication Date 出版日期 2008-08-01 Product Dimensions 商品尺寸 9.2 x 6.1 x 0.6 cm Shipping Weight 商品重量 490g Language 语种 英语 Book Contents 内容简介 Information / Knowledge Management
¥648.00

【预订】Knowledge Management and Intellectual Capital 9781403938 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781403938060 Author 作者 Bukh Format 版本 精装 Pages Number 页数 258页 Publication Date 出版日期 2005-04-05 Shipping Weight 商品重量 455g Language 语种 英语 Book Contents 内容简介 From various angles and perspectives this book shows how knowledge management is actually practised in many different European firms. New dimensions of well-known management principles and concepts emerge by focusing on knowledge. Leading researchers and experts from European business schools offer new insight into the range of practical problems that can be addressed and methods that can be applied when knowledge is put on the management agenda.
¥1179

【预订】Knowledge Management and Information Tools for Building 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9783319239576 Author 作者 Talamo Format 版本 精装 Pages Number 页数 211页 Publication Date 出版日期 2015-11-10 Shipping Weight 商品重量 502g Language 语种 英语 Book Contents 内容简介 This book describes the latest methods and tools for the management of information within facility management services and explains how it is possible to collect, organize, and use information over the life cycle of a building in order to optimize the integration of these services and improve the efficiency of processes. The coverage includes presentation and analysis of basic concepts, procedures, and international standards in the development and management of real estate inventories, building registries, and information systems for facility management. Models of strategic management are discussed and the functions and roles of the strategic management center, explained. Detailed atten
¥1643

【预订】Knowledge Management in High Risk Industries 97830304921 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9783030492120 Author 作者 Fauquet-Alekhine Format 版本 精装 Pages Number 页数 128页 Publisher 出版社 Palgrave Macmillan Publication Date 出版日期 2020-07-01 Product Dimensions 商品尺寸 8.2 x 5.8 x 0.3 cm Shipping Weight 商品重量 740g Language 语种 英语 Book Contents 内容简介 As highly skilled workers retire, what happens to their wealth of experience This book explores the concept of skills drain, looking at how key competencies can be identified and then transferred from experienced workers to novices. It looks at the innovative solutions managers are seeking to ensure that their workers are sufficiently trained, and then develops a protocol for doing so.Founded in academic theory, but with applications for practice, this book presents case studies and research in a valuable addition to the field of management. It will be a useful reading for acad
¥708.00

【预订】Knowledge Management: Libraries and Librarians 美国库房发货,通常付款后3-5周到货!
¥1337

¥962.20

【预订】Knowledge Management 9781843341147 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781843341147 Author 作者 Milton, Nick Format 版本 平装-胶订 Pages Number 页数 168页 Publication Date 出版日期 2005-08-31 Product Dimensions 商品尺寸 9.2 x 6.1 x 0.3 cm Shipping Weight 商品重量 270g Language 语种 英语 Book Contents 内容简介 Information / Knowledge Management
¥550.00

【预订】Knowledge Management and Organizational Learning: A 美国库房发货,通常付款后3-5周到货!
¥2763

【预订】Knowledge Management and Organizational Memories Y978079 美国库房发货,通常付款后3-5周到货!
¥1095

【预订】Knowledge Management in the Sharing Economy 978331966889 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9783319668895 Author 作者 V?t?m?nescu Format 版本 精装 Pages Number 页数 288页 Publisher 出版社 Springer International Publishing Publication Date 出版日期 2017-11-23 Shipping Weight 商品重量 613g Language 语种 英语 Book Contents 内容简介 This volume explores the challenge of engaging knowledge management in a sharing economy. In a hyper-competitive business environment, everything tends to be digital, virtual and highly networked, which raises the issue of how knowledge management can support the decision whether or not to share strategic resources or capabilities. The book answers questions such as: to what extent does the sharing economy preserve or compromise the competitive advantage of organizations And what are the knowledge-management strategies for competitive, yet cautious sharing dynamics?
¥1424

【预售 按需印刷】Knowledge Management in Open Source Softw
¥661.30

【预售 按需印刷】Knowledge Management for Libraries
¥1122

【预订】Knowledge Management in Organizations 9783319952031 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9783319952031 Author 作者 Uden Format 版本 平装-胶订 Publisher 出版社 Springer Publication Date 出版日期 2018-07-11 Language 语种 英语 Book Contents 内容简介 This book contains the refereed proceedings of the 13th International Conference on Knowledge Management in Organizations, KMO 2018, held in ?ilina, Slovakia, in August 2018. The theme of the conference was "Emerging Research for Knowledge Management in Organizations."The 59 papers accepted for KMO 2018 were selected from 141 submissions and are organized in topical sections on: Knowledge management models and analysis; knowledge sharing; knowledge transfer and learning; knowledge and service innovation; knowledge creation; knowledge and organization; information systems and information science; knowledge and technology management; data mining and intelligent science; business and customer relationship management; big d
¥1095

【预订】Knowledge Management Systems 9781599040608 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781599040608 Author 作者 Petter Gottschalk Format 版本 精装 Pages Number 页数 322页 Publisher 出版社 Idea Group Publishing Publication Date 出版日期 2006-09-30 Language 语种 英语 Book Contents 内容简介 The main objective of knowledge management is to support the creation, transfer, and application of knowledge. Researchers and practitioners have emphasized the important role of knowledge management in electronic business and IT outsourcing relationships. Knowledge Management Systems: Value Shop Creation is based on the premise that it is difficult, if not impossible, to manage an organization without at least some understanding of knowledge management and knowledge management systems.Knowledge Management Systems: Value Shop Creation combines knowledge management with other subject areas within the management information systems field. The scholarly value of this book
¥812.00

【预订】Knowledge Management and Acquisition for Intelligent Sys 国外库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9783030698850 Author 作者 Uehara Format 版本 平装-胶订 Pages Number 页数 187页 Publisher 出版社 Springer Berlin Heidelberg Publication Date 出版日期 2021-02-20 Product Dimensions 商品尺寸 9.2 x 6.1 x 0.4 cm Shipping Weight 商品重量 630g Language 语种 其它(含多语) Book Contents 内容简介 This book constitutes the proceedings of the 17th International Workshop on Knowledge Management and Acquisition for Intelligent Systems, PKAW 2020, held in Yokohama, Japan, in January 2021.The 10 full papers and 5 short papers included in this volume were carefully reviewed and selected from 28 initial submissions. PKAW primarily focuses on the multidisciplinary approach of the human-driven and data-driven knowledge acquisition, which is the key concept that has remained unchanged since the workshop has been established.
¥548.00

【预订】Knowledge Management and Management Learning: 9781441938 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781441938404 Author 作者 Baets Format 版本 平装-胶订 Pages Number 页数 394页 Publication Date 出版日期 2010-12-08 Language 语种 英语 Book Contents 内容简介 Knowledge Management and Management Learning: Extending the Horizons of Knowledge-Based Management examines a range of topical considerations in the field by utilizing dynamic and non-linear systems behavior or the complexity paradigm. From this examination have come a number of new and promising relevant extensions to knowledge management and its practice. Many of the topics have been pulled from ’real world’ situations in actual companies, and therefore these topical treatments reflect quantitative and qualitative research done within the knowledge management framework of actual company experience. Offered are a series of topical treatments that extend the parameters of knowledge management and examine the practica
¥1533

【预订】Knowledge Management and Higher Education 9781591405092 美国库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781591405092 Author 作者 Amy Metcalfe Format 版本 精装 Pages Number 页数 352页 Publisher 出版社 Information Science Publishing Publication Date 出版日期 2005-09-30 Language 语种 英语 Book Contents 内容简介 The combination of a techno-centric infrastructure, an electronically-driven business core, and the rise of computer-based instructional techniques creates a campus environment ripe for e-commerce trends.While many books on the topic of knowledge management (KM) focus on functional issues relating to implementation of KM techniques, Knowledge Management in Higher Education: A Critical Analysis addresses the social aspects of KM that are largely ignored. Using various social science perspectives, Knowledge Management in Higher Education: A Critical Analysis provides critical analyses of KM in higher education, with an emphasis on unintended consequences and future
¥727.00

【预订】Knowledge Management in Organizations 9780198724018 国外库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9780198724018 Author 作者 Hislop Donald Format 版本 平装-胶订 Pages Number 页数 344页 Publisher 出版社 Oxford University Press Publication Date 出版日期 2018-03-29 Language 语种 英语 Book Contents 内容简介 The most comprehensive and critical textbook on knowledge management, in an accessible, concise format.
¥895.00

【预订】Knowledge Management 9789812770585 美国库房发货,通常付款后3-5周到货!
¥1721