- Author: Stephen Davies
- Language: Spanish
- Year: 2017
- Author: Stephen Davies Bruce Lyons et al.
- Language: English
- Year: 1991
- Author: Stephen Davies
- Language: English
- Year: 2013
- Author: Stephen Davies
- Language: English
- Year: 2010
- Author: Stephen Davies
- Language: English
- Year: 2005
- Author: Stephen Davies Kathleen Marie Higgins Robert Hopkins Robert Stecker David E. Cooper
- Language: English
- Year: 2009
- Author: Stephen Davies Bruce Lyons
- Language: English
- Year: 2008