Cita APA

Key, V. O. 1. (1964). Politics, parties, & pressure groups (5. edition.). New York: Thomas Y. Crowell Company.

Citación estilo Chicago

Key, Valdimer Orlando 1908-1963. Politics, Parties, & Pressure Groups. 5. edition. New York: Thomas Y. Crowell Company, 1964.

Cita MLA

Key, Valdimer Orlando 1908-1963. Politics, Parties, & Pressure Groups. 5. edition. New York: Thomas Y. Crowell Company, 1964.