Cita APA (7a ed.)

Lewis, C. (1977). The Screwtape Letters: With Screwtape Proposes a Toast. Macmillan.

Cita Chicago Style (17a ed.)

Lewis, C.S. The Screwtape Letters: With Screwtape Proposes a Toast. New York: Macmillan, 1977.

Cita MLA (9a ed.)

Lewis, C.S. The Screwtape Letters: With Screwtape Proposes a Toast. Macmillan, 1977.