APA (7th ed.) Citation

Lewis, C. S. (1983). The problem of pain (23. impr.). Collins.

Chicago Style (17th ed.) Citation

Lewis, C. S. The Problem of Pain. 23. impr. Glasgow: Collins, 1983.

MLA (9th ed.) Citation

Lewis, C. S. The Problem of Pain. 23. impr. Collins, 1983.

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