| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Presidential Temperament: The Unfolding of Character in the Forty Presidents of the United States/With Supplement | 978-0-9606954-6-1 (0-9606954-6-X) | 1992 | Ray Choiniere |
| Versteh Mich Bitte: Charakter-Und Temperament-Typen | 978-0-9606954-4-7 (0-9606954-4-3) | 1990 | |