APA-referens (7:e uppl.)

Martindale, C. C. (1937). The difficult commandment: Notes on self-control especially for young men (9th ed.). P.J. Kennedy & Sons.

Chicago-referens (17:e uppl.)

Martindale, C. C. The Difficult Commandment: Notes on Self-control Especially for Young Men. 9th ed. New York: P.J. Kennedy & Sons, 1937.

MLA-referens (8:e uppl.)

Martindale, C. C. The Difficult Commandment: Notes on Self-control Especially for Young Men. 9th ed. P.J. Kennedy & Sons, 1937.