- Author: Neil Christiansen, Robert Tett, Robert Tette
- Language: English
- Year: 2013
- Author: Linda O. Valenty, Ofer Feldman
- Language: English
- Year: 2002
- Author: Newport Cal
- Language: English
- Year: 2012
- Author: Furnham Adrian
- Language: English
- Year: 2008
- Author: Furnham Adrian
- Language: English
- Year: 1992