APA (7th ed.) Citation

McMahon, F. E. (1945). A Catholic Looks at the World (3rd printing.). Vanguard Press.

Chicago Style (17th ed.) Citation

McMahon, Francis Elmer. A Catholic Looks at the World. 3rd printing. New York: Vanguard Press, 1945.

MLA (9th ed.) Citation

McMahon, Francis Elmer. A Catholic Looks at the World. 3rd printing. Vanguard Press, 1945.