| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| International Biographical Dictionary of Religion. An Encyclopedia of more than 4000 Leading Personalities: An Encyclopedia of More Than 4000 Leading Personalities | 978-3-598-11100-6 (3-598-11100-2) | 1993 | ||
| The 9 Disciplines of a Facilitator: Leading Groups by Transforming Yourself | 978-0-7879-8068-9 (0-7879-8068-4) | 2006 | Maureen R. Jenkins | |