| Titel | ISBN-13 (ISBN-10) | Erscheinungsjahr |
|---|---|---|
| This Year Will Be Different: The insightful guide to becoming a freelancer | 978-3-9503967-0-6 (3-9503967-0-5) | 2015 |
| This Year Will Be Different: The insightful guide to becoming a freelancer | 978-3-9503967-1-3 (3-9503967-1-3) | 2015 |