APA (7th ed.) Citation

Zahn, G. C. (1971). The Great Catholic Upheaval. New York.

Chicago Style (17th ed.) Citation

Zahn, Gordon C. The Great Catholic Upheaval. New York, 1971.

MLA (8th ed.) Citation

Zahn, Gordon C. The Great Catholic Upheaval. New York, 1971.

Warning: These citations may not always be 100% accurate.