APA (7th ed.) Citation

Lewis, C. S. (1946). The problem of pain / by C.S. Lewis (7th ed.). Centenary Press.

Chicago Style (17th ed.) Citation

Lewis, C. S. The Problem of Pain / by C.S. Lewis. 7th ed. Centenary Press, 1946.

MLA (9th ed.) Citation

Lewis, C. S. The Problem of Pain / by C.S. Lewis. 7th ed. Centenary Press, 1946.

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