APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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