Stewart, C. (1998). Cassian the monk. Oxford University Press.
Cita Chicago (17th ed.)Stewart, Columba. Cassian the Monk. New York: Oxford University Press, 1998.
Cita MLA (9th ed.)Stewart, Columba. Cassian the Monk. Oxford University Press, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.