APA (7th ed.) Citation

Lewis, C. S. (1966). The Screwtape letters: Screwtape proposes a toast (Primera edición.). The Macmillan Company.

Chicago Style (17th ed.) Citation

Lewis, Clive Staples. The Screwtape Letters: Screwtape Proposes a Toast. Primera edición. New York: The Macmillan Company, 1966.

MLA (8th ed.) Citation

Lewis, Clive Staples. The Screwtape Letters: Screwtape Proposes a Toast. Primera edición. The Macmillan Company, 1966.