- Author: Christine Talbot
- Language: English
- Year: 2010
- Author: Robert C. Solomon Kathleen M. Higgins
- Language: English
- Year: 2013
- Author: Louis P. Pojman Paul Pojman Katie McShane
- Language: English
- Year: 2016
- Author: Oren Ergas Sharon Todd
- Language: English
- Year: 2016
- Author: W. T. Jones Robert J. Fogelin
- Language: English
- Year: 1969