APA (7th ed.) Citation

Lewis, C. (2001). The screwtape letters: With Screwtape Proposes a Toast. HarperCollins.

Chicago Style (17th ed.) Citation

Lewis, C.S. The Screwtape Letters: With Screwtape Proposes a Toast. New York,New York: HarperCollins, 2001.

MLA (9th ed.) Citation

Lewis, C.S. The Screwtape Letters: With Screwtape Proposes a Toast. HarperCollins, 2001.

Warning: These citations may not always be 100% accurate.