| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| The Alex Studies: Cognitive and Communicative Abilities of Grey Parrots | Paperback | 978-0-674-00806-9 (0-674-00806-5) | 2002 |
| The Alex Studies: Cognitive and Communicative Abilities of Grey Parrots | Hardcover | 978-0-674-00051-3 (0-674-00051-X) | 2000 |
I. M. Pepperberg · I. P. · Irene M. Pepperberg · Irene Pepperberg · M P