Mackenzie, C. (1929). The three couriers. Cassell.
Cita Chicago (17th ed.)Mackenzie, Compton. The Three Couriers. London: Cassell, 1929.
Cita MLA (8th ed.)Mackenzie, Compton. The Three Couriers. Cassell, 1929.
Atenció: Aquestes cites poden no estar 100% correctes.