APA (7 ম সংস্করণ) উদ্ধৃতি

Demacopoulos, G. E. (2015). Gregory the Great: Ascetic, pastor, and first man of Rome. University of Notre Dame Press.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Demacopoulos, George E. Gregory the Great: Ascetic, Pastor, and First Man of Rome. Notre Dame, Indiana: University of Notre Dame Press, 2015.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Demacopoulos, George E. Gregory the Great: Ascetic, Pastor, and First Man of Rome. University of Notre Dame Press, 2015.