Cita APA (7a ed.)

Lewis, C. S. (1944). The problem of pain. The Macmillan Company.

Cita Chicago Style (17a ed.)

Lewis, C. S. The Problem of Pain. New York: The Macmillan Company, 1944.

Cita MLA (9a ed.)

Lewis, C. S. The Problem of Pain. The Macmillan Company, 1944.