Academy of Political Science (U.S.). (1928). Proceedings of the Academy of Political Science. Academy of Political Science, Columbia University.
Chicago-referens (17:e uppl.)Academy of Political Science (U.S.). Proceedings of the Academy of Political Science. New York: Academy of Political Science, Columbia University, 1928.
MLA-referens (8:e uppl.)Academy of Political Science (U.S.). Proceedings of the Academy of Political Science. Academy of Political Science, Columbia University, 1928.
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