Key, V. O. (1952). Politics, parties, and presure groups. New York: Thomas Y Crowell Company.
Trích dẫn kiểu ChicagoKey, V. O. Politics, Parties, and Presure Groups. New York: Thomas Y Crowell Company, 1952.
Deismireacht MLAKey, V. O. Politics, Parties, and Presure Groups. New York: Thomas Y Crowell Company, 1952.
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