Cita APA (7a ed.)

Lunn, A. (1957). Enigma: A study of moral re-armament (1st published.). Longmans, Green and Co.

Cita Chicago Style (17a ed.)

Lunn, Arnold. Enigma: A Study of Moral Re-armament. 1st published. London [etc.]: Longmans, Green and Co, 1957.

Cita MLA (9a ed.)

Lunn, Arnold. Enigma: A Study of Moral Re-armament. 1st published. Longmans, Green and Co, 1957.