APA (7th ed.) Citation

O'Brien, J. A. (1946). The soul, what is it ?: Light from modern science and philosophy. Paulist Press.

Chicago Style (17th ed.) Citation

O'Brien, John A. The Soul, What Is It ?: Light from Modern Science and Philosophy. New York, N.Y.: Paulist Press, 1946.

MLA (8th ed.) Citation

O'Brien, John A. The Soul, What Is It ?: Light from Modern Science and Philosophy. Paulist Press, 1946.