APA (7th ed.) Citation

Cunningham, J. F. (1938). Why I am a Catholic. Paulist Press.

Chicago Style (17th ed.) Citation

Cunningham, James F. Why I Am a Catholic. New York: Paulist Press, 1938.

MLA (8th ed.) Citation

Cunningham, James F. Why I Am a Catholic. Paulist Press, 1938.