Merritt, R. L. (1970). Systematic approaches to comparative politics. Rand McNally & Co..
Lua i Stíl Chicago (17ú heag.)Merritt, Richard L. Systematic Approaches to Comparative Politics. Chicago: Rand McNally & Co., 1970.
Lua MLA (9ú heag.)Merritt, Richard L. Systematic Approaches to Comparative Politics. Rand McNally & Co., 1970.
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