APA (7th ed.) Citation

Lewis, C. S. (1942). The screwtape letters ([1st ed., repr.].). Bles.

Chicago Style (17th ed.) Citation

Lewis, C. S. The Screwtape Letters. [1st ed., repr.]. London: Bles, 1942.

MLA (9th ed.) Citation

Lewis, C. S. The Screwtape Letters. [1st ed., repr.]. Bles, 1942.

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