- Author: Hutton Sarah
- Language: English
- Year: 2015
- Author: Jan Westerhoff
- Language: English
- Year: 2018
- Author: Jan Westerhoff
- Language: English
- Year: 2018
- Author: Bhushan Nalini, Garfield Jay L
- Language: English
- Year: 2017
- Author: Desmond M. Clarke
- Language: English
- Year: 2016
- Author: Gary Gutting
- Language: English
- Year: 2013
- Author: Cheryl Misak
- Language: English
- Year: 2013
- Author: Sarah Hutton
- Language: English
- Year: 2015
- Author: Thomas Hurka
- Language: English
- Year: 2015