APA (7th ed.) Citation

Lewis, C. (2000). The screwtape letters. HarperCollins.

Chicago Style (17th ed.) Citation

Lewis, C.S. The Screwtape Letters. New York: HarperCollins, 2000.

MLA (9th ed.) Citation

Lewis, C.S. The Screwtape Letters. HarperCollins, 2000.

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