- Author: Ian Sinclair, Peter Ryan
- Language: English
- Year: 2020
- Author: Baumber Peter, Ryan Sian, Zulch Helen
- Language: English
- Year: 2015
- Author: Peter Ryan
- Language: English
- Year: 2019
- Author: Peter Ryan
- Language: English
- Year: 2019
- Author: Peter Ryan Steve Schneider Michael Goldsmith Gavin Lowe Bill Roscoe
- Language: English
- Year: 2000
- Author: Peter Ryan
- Language: English
- Year: 2014
- Author: Joseph A. Goguen (auth.) Peter Ryan BSc PhD Chris Sennett MA DPhil (eds.)
- Language: English
- Year: 1993
- Author: Peter Ryan DProf MSc CQSW Steve Morgan BA BPL DipCOT MA
- Language: English
- Year: 2004
