APA (7th ed.) Citation

Lewis, C. S. (1962). The screwtape letters & Screwtape proposes a toast. Macmillan.

Chicago Style (17th ed.) Citation

Lewis, C. S. The Screwtape Letters & Screwtape Proposes a Toast. New York: Macmillan, 1962.

MLA (9th ed.) Citation

Lewis, C. S. The Screwtape Letters & Screwtape Proposes a Toast. Macmillan, 1962.