O'Brien, J. A. (1920). The spread of the Church a proof of her divinity: A study in the philosophy of history. Paulist Press.
Chicago Style (17th ed.) CitationO'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.
MLA (8th ed.) CitationO'Brien, John A. The Spread of the Church a Proof of Her Divinity: A Study in the Philosophy of History. Paulist Press, 1920.
Warning: These citations may not always be 100% accurate.