- Author: Perry Greg
- Language: English
- Year: 2001
- Author: Perry Greg M
- Language: English
- Year: 2006
- Author: Perry Greg, Hettihewa Sanjaya
- Language: English
- Year: 1999
- Author: Perry Greg
- Language: English
- Year: 2011
- Author: Miller Dean, Perry Greg M
- Language: English
- Year: 2016
- Author: Miller Dean, Perry Greg M
- Language: English
- Year: 2016
- Author: Perry Greg & Miller Dean [Perry Greg]
- Language: English
- Year: 2013
- Author: Greg M. Perry Greg Perry
- Language: English
- Year: 2001
- Author: Greg M. Perry Greg Perry
- Language: English
- Year: 1999