APA (7th ed.) Citation

Archer, P. (1941). The Christian calendar and the Gregorian reform. Fordham University Press.

Chicago Style (17th ed.) Citation

Archer, Peter. The Christian Calendar and the Gregorian Reform. New York: Fordham University Press, 1941.

MLA (8th ed.) Citation

Archer, Peter. The Christian Calendar and the Gregorian Reform. Fordham University Press, 1941.

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