O'Brien, J. A. (1946). Is the will free?: Light from modern science and philosophy. Paulist Press.
Lua i Stíl Chicago (17ú heag.)O'Brien, John A. Is the Will Free?: Light from Modern Science and Philosophy. New York: Paulist Press, 1946.
Lua MLA (8ú heag.)O'Brien, John A. Is the Will Free?: Light from Modern Science and Philosophy. Paulist Press, 1946.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.