APA (7th ed.) Citation

O'Brien, J. A. (1937). Why not a mixed marriage?: A plain answer to a common question. Paulist Press.

Chicago Style (17th ed.) Citation

O'Brien, John A. Why Not a Mixed Marriage?: A Plain Answer to a Common Question. New York: Paulist Press, 1937.

MLA (8th ed.) Citation

O'Brien, John A. Why Not a Mixed Marriage?: A Plain Answer to a Common Question. Paulist Press, 1937.