Ryan, J. A. (1934). The Catholic Teaching on Our Industrial System. Washington, D.C..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRyan, John A. The Catholic Teaching on Our Industrial System. Washington, D.C., 1934.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRyan, John A. The Catholic Teaching on Our Industrial System. Washington, D.C., 1934.
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