| title | ISBN-13 | year of publication |
|---|---|---|
| Applied Psychology: Variety and Opportunity | 978-0-205-12664-4 | 1991 |
| Environmental Psychology: Principles and Practice | 978-0-9688543-1-0 | 2007 |
| Environmental Psychology: Principles and Practice | 978-0-9688543-0-3 | 2001 |
| Environmental Psychology: Principles and Practice | 978-0-205-18941-0 | 1996 |
| Environmental Psychology: Principles and Practice | 978-0-205-10461-1 | 1987 |
Robert G. · Robert Gebhard · Robert Giffard · Roberta Gibertoni · Rupert Gebhard