Zahn, G. C. (1971). The Great Catholic Upheaval. New York.
Chicago Style aipamenaZahn, Gordon C. The Great Catholic Upheaval. New York, 1971.
MLA aipamenaZahn, Gordon C. The Great Catholic Upheaval. New York, 1971.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.