| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| We Are All Sales, People: 5 Steps to Fulfilling Relationships and Improved Communication at Home, School, and Work | 978-1-733871O-2-O (1-733871O-2-O) | 2020 |
Berit Kristoffersen · Bert Kerstin · Bert Kruijt · Birte Karstens · Britt Kirstein