Cita APA (7a ed.)

Lewis, C. S. (1965). The problem of pain (6a imp.). Collins.

Cita Chicago Style (17a ed.)

Lewis, C. S. The Problem of Pain. 6a imp. London [etc.]: Collins, 1965.

Cita MLA (9a ed.)

Lewis, C. S. The Problem of Pain. 6a imp. Collins, 1965.