APA (7th ed.) Citation

Key, V. O. (1964). Politics, parties, and pressure groups (5th ed.). Crowell.

Chicago Style (17th ed.) Citation

Key, Valdimer Orlando. Politics, Parties, and Pressure Groups. 5th ed. New York: Crowell, 1964.

MLA (9th ed.) Citation

Key, Valdimer Orlando. Politics, Parties, and Pressure Groups. 5th ed. Crowell, 1964.