- Author: Steve Winder
- Language: English
- Year: 2017
- Author: Lars Nordgren
- Language: English
- Year: 2015
- Author: Morton Walker
- Language: English
- Year: 2012
- Author: Keith Ward
- Language: English
- Year: 2015
- Author: Peter Verstraten
- Language: English
- Year: 2016
- Author: Dawn Apgar PhD LSW ACSW
- Language: English
- Year: 2016
- Author: Mike Hannay and Elseline Vester
- Language: English
- Year: 1990
- Author: Michelle Martinez
- Language: English
- Year: 2016
- Author: Eleanor Criswell
- Language: English
- Year: 1989
- Author: Thomas P. Olivo C. Thomas Olivo
- Language: English
- Year: 2010