| title | ISBN-13 | year of publication | |
|---|---|---|---|
| Der E-Commerce Survival Guide | 978-3-430-17874-7 | 2001 | |
| e-Learning 2.0: Proven Practices and Emerging Technologies to Achieve Real Results | 978-0-8144-1073-8 | 2009 | |
| The E-Commerce Question and Answer Book: A Survival Guide for Business Managers | 978-0-8144-7154-8 | 2002 | |
| The E-Commerce Question and Answer Book: A Survival Guide for Business Managers | 978-0-8144-0525-3 | 2000 |