APA (7th ed.) Citation

Cunningham, J. M. (1956). Warhorse: A novel of the old West. Macmillan.

Chicago Style (17th ed.) Citation

Cunningham, John M. Warhorse: A Novel of the Old West. New York: Macmillan, 1956.

MLA (9th ed.) Citation

Cunningham, John M. Warhorse: A Novel of the Old West. Macmillan, 1956.