APA (7th ed.) Citation

Lewis, C. S. (1982). The Screwtape letters. Bantam Books.

Chicago Style (17th ed.) Citation

Lewis, C. S. The Screwtape Letters. New York: Bantam Books, 1982.

MLA (9th ed.) Citation

Lewis, C. S. The Screwtape Letters. Bantam Books, 1982.

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