| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Teaching Sign Language to Chimpanzees | 978-0-88706-966-6 (0-88706-966-5) | 1989 | Beatrix T. Gardner · Thomas E. Van Cantfort |
| The Structure of Learning | 978-1-138-00277-7 (1-138-00277-1) | 2014 | |
A.G. · A. Gardner · Allen Gardner · R. A. · R. Allen · R. Gardner