| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Die Geheimnisse erfolgreicher Online-Marketer | 978-0-692-22387-1 | 2014 | Reto Stuber |
| How to generate new clients and revenue in only 7 days | 978-0-692-22388-8 | 2014 | " |
| Neue Kunden und mehr Umsatz in 7 Tagen | 978-0-692-22386-4 | 2014 | " |
| The secrets of successful Online Marketers | 978-0-692-22389-5 | 2014 | " |