Voegelin, E., & Sandoz, E. (1999). History of political ideas: New order & last orientation. University of Missouri Press.
Lua i Stíl Chicago (17ú heag.)Voegelin, Eric, agus Ellis Sandoz. History of Political Ideas: New Order & Last Orientation. Columbia: University of Missouri Press, 1999.
Lua MLA (9ú heag.)Voegelin, Eric, agus Ellis Sandoz. History of Political Ideas: New Order & Last Orientation. University of Missouri Press, 1999.
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