- Author: Peter Shepherd Gregory Unsworth-Mitchell
- Language: Arabic
- Author: Peter Bullock Gregory
- Language: English
- Year: 1991
- Author: David Ingram Daphne Vince Prue Peter J. Gregory
- Language: English
- Year: 2002
- Author: Peter H. Gregory
- Language: English
- Year: 2009
- Author: Robert Carlson Stephen A. Fulling and Peter Kuchment Gregory Berkolaiko
- Language: English
- Year: 2006
- Author: Peter Howell Gregory Kozyreff John Ockendon
- Language: English
- Year: 2009
- Author: Peter H. Gregory Mike Simon
- Language: English
- Year: 2005
- Author: Peter H. Gregory Mike Simon
- Language: English
- Year: 2005
- Author: Peter H. Gregory
- Language: English
- Year: 2004
- Author: Peter Howell Gregory Kozyreff John Ockendon
- Language: English
- Year: 2009