- Author: Cornelis De Waal Krzysztof Piotr Skowroński
- Language: English
- Year: 2012
- Author: Frans de de Waal
- Language: English
- Year: 2011
- Author: Kenneth Reid, Marius de Waal, Reinhard Zimmermann
- Language: English
- Year: 2007
- Author: Frans de Waal (editor), Stephen Macedo (editor), Josiah Ober (editor)
- Language: English
- Year: 2009
- Author: Nathan Emery, Frans de Waal
- Language: English
- Year: 2016
- Author: Frans B. M. de Waal (editor), Pier Francesco Ferrari (editor)
- Language: English
- Year: 2012
- Author: Frans B. M. de Waal, F. B. M. de Waal
- Language: English
- Year: 2009