| title | ISBN-13 | year of publication | |
|---|---|---|---|
| Crashkurs Führung | 978-3-8068-7618-5 | 2001 | |
| TAG des Buches, LeseNACHT. Grundschule und Bibliothek. | 978-3-89111-808-5 | 2003 | |
| The Leadership Crash Course: How to Create Personal Leadership Value | 978-0-7494-4638-3 | 2006 | |
| The Leadership Crash Course: How to Create Personal Leadership Value: A 6-step Fast-track Self-development Programme | 978-0-7494-3142-6 | 2000 |
Aol Verlag · Falken · Kogan Page