Ryan, J. A. (1934). The Catholic teaching on our industrial system (2d ed.). National Council of Catholic Men.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRyan, John A. The Catholic Teaching on Our Industrial System. 2d ed. Washington: National Council of Catholic Men, 1934.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRyan, John A. The Catholic Teaching on Our Industrial System. 2d ed. National Council of Catholic Men, 1934.
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