O'Brien, J. A. (1920). The spread of the Church a proof of her divinity: A study in the philosophy of history. Paulist Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रO'Brien, John A. The Spread of the Church a Proof of Her Divinity: A Study in the Philosophy of History. New York, N.Y.: Paulist Press, 1920.
एमएलए (8वां संस्करण) प्रशस्ति पत्रO'Brien, John A. The Spread of the Church a Proof of Her Divinity: A Study in the Philosophy of History. Paulist Press, 1920.
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