Cita APA (7th ed.)

Martin, W. (1975). Screwtape writes again. Vision House.

Cita Chicago (17th ed.)

Martin, Walter. Screwtape Writes Again. Santa Ana: Vision House, 1975.

Cita MLA (9th ed.)

Martin, Walter. Screwtape Writes Again. Vision House, 1975.

Atenció: Aquestes cites poden no estar 100% correctes.