APA (7th ed.) Citation

Key, V. O. (1942). Politics, parties and pressure groups. Thomas Y. Crowell company.

Chicago Style (17th ed.) Citation

Key, V. O. Politics, Parties and Pressure Groups. New York: Thomas Y. Crowell company, 1942.

MLA (9th ed.) Citation

Key, V. O. Politics, Parties and Pressure Groups. Thomas Y. Crowell company, 1942.