| title | media type | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|---|
| The Cognitive Animal: Empirical and Theoretical Perspectives on Animal Cognition | Hardcover | 978-0-262-02514-0 (0-262-02514-0) | 2002 | Marc Bekoff · Colin Allen |
| The Genesis of Animal Play: Testing the Limits | Paperback | 978-0-262-52469-8 (0-262-52469-4) | 2006 | |
| The Genesis of Animal Play: Testing the Limits | Hardcover | 978-0-262-02543-0 (0-262-02543-4) | 2005 | |
G.B. · G.M. · Gordon Burghardt · Gordon M. · M B