- Author: Frank Harold Wilson
- Language: English
- Year: 2004
- Author: Saegert Susan, Thompson J. Phillip, Warren Mark R.
- Language: English
- Year: 2005
- Author: Schwartz Joel
- Language: English
- Year: 2000
- Author: Moller David Wendell
- Language: English
- Year: 2012
- Author: William Julius Wilson
- Language: English
- Year: 1993