APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Key, Valdimer O. Politics, Parties, & Pressure Groups. 5. ed. New York: Crowell, 1964.

MLA (9th ed.) Citation

Key, Valdimer O. Politics, Parties, & Pressure Groups. 5. ed. Crowell, 1964.