Key, V. O. (1952). Politics, parties, and presure groups. New York: Thomas Y Crowell Company.
Chicago Style CitationKey, V. O. Politics, Parties, and Presure Groups. New York: Thomas Y Crowell Company, 1952.
Cita MLAKey, V. O. Politics, Parties, and Presure Groups. New York: Thomas Y Crowell Company, 1952.
Atenció: Aquestes cites poden no estar 100% correctes.