F -G · Frits Gerdessen · Fritz P. Grutzner
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Promowanie firmy wskazowki i przestrogi | 978-83-264-0271-5 (83-264-0271-0) | 2010 | Birk Cooper · Scott Cooper |
| Tips and Traps for Marketing Your Business | 978-0-07-149489-2 (0-07-149489-8) | 2008 | Scott Cooper · Birk Cooper |