| Titel | ISBN-13 (ISBN-10) | Erscheinungsjahr |
|---|---|---|
| Workplace Revolution: Outperform Competition through Employee Engagement | 978-3-9525172-0-8 (3-9525172-0-8) | 2019 |
| Workplace Revolution: Outperform Competition through Employee Engagement | 978-3-9525172-2-2 (3-9525172-2-4) | 2019 |