- Author: Wittman Donald, Grofman Bernard
- Language: English
- Year: 1989
- Author: Grofman Bernard, Lijphart Arend, Shugart Matthew Soberg, Taylor Steven L
- Language: English
- Year: 2015
- Author: Grofman Bernard, Lijphart Arend, Shugart Matthew Soberg, Taylor Steven L
- Language: English
- Year: 2014