Catholic Association for International Peace (U.S.). Committee on Ethics, Catholic Association for International Peace (U.S.). Joint Policy Committee, National Catholic Welfare Conference. Study Club Committee, Ryan, J. A., & McMahon, F. E. (1940). The obligation of Catholics to promote peace. The Paulist Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCatholic Association for International Peace (U.S.). Committee on Ethics, Catholic Association for International Peace (U.S.). Joint Policy Committee, National Catholic Welfare Conference. Study Club Committee, John A. Ryan, और Francis Elmer McMahon. The Obligation of Catholics to Promote Peace. New York: The Paulist Press, 1940.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCatholic Association for International Peace (U.S.). Committee on Ethics, et al. The Obligation of Catholics to Promote Peace. The Paulist Press, 1940.