APA (7th ed.) Citation

Lewis, C. S. (1945). The Screwtape letters. Geoffrey Bles : The Centenary Press.

Chicago Style (17th ed.) Citation

Lewis, C. S. The Screwtape Letters. London: Geoffrey Bles : The Centenary Press, 1945.

MLA (9th ed.) Citation

Lewis, C. S. The Screwtape Letters. Geoffrey Bles : The Centenary Press, 1945.

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