Beat Hächler · Betty H · Betty J. Hassler · Dr. Betty Hassler
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Conversation Peace: Improving Your Relationships One Word at a Time | 978-0-8054-3081-3 (0-8054-3081-4) | 2004 | Mary Kassian |
| Open Windows Summer 2012 | 978-1-4300-1195-8 (1-4300-1195-5) | 2012 | |