| Titel | ISBN-13 (ISBN-10) | Erscheinungsjahr |
|---|---|---|
| Dealing with an International Clientele: Communications, Diplomacy and Etiquette | 978-3-11-916039-1 (3-11-916039-3) | 2005 |
| Dealing with an International Clientele: Communications, Diplomacy and Etiquette | 978-3-598-24370-7 (3-598-24370-7) | 2005 |