Butmen Nikolas · Nicholas Boothman
Helion · Workman Publishing Company
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Daj sie polubic w 90 sekund | 978-83-246-2245-0 (83-246-2245-4) | 2010 |
| How to Make People Like You in 90 Seconds or Less | 978-0-7611-4946-0 (0-7611-4946-5) | 2008 |