- Author: Peter McDonough, Samuel H. Barnes, Antonio Lopez-Pina
- Language: English
- Year: 2018
- Author: M. Kent Jennings, Jan W. van Deth, Samuel H. Barnes, Dieter Fuchs, Felix J. Heunks, Ronald Inglehart, Max Kaase, Hans-Dieter Klingemann, Jacques J. A. Thomassen
- Language: English
- Year: 1989