| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Moderating Focus Groups: A Practical Guide for Group Facilitation | 978-0-7619-2044-1 (0-7619-2044-7) | 1999 |
| The Handbook for Focus Group Research | 978-0-7619-1253-8 (0-7619-1253-3) | 1997 |
D. G. · D. T. · D. Thomas · Dr. G. · Dr. Thomas · L.G. · Thomas-G · Thomas L. · Thomas L. Greenbaum