APA (7th ed.) Citation

Gregori I, p. (1982). Registrum Epistularum Libri I-VII. Brepols.

Chicago Style (17th ed.) Citation

Gregori I, papa. Registrum Epistularum Libri I-VII. Turnholt: Brepols, 1982.

MLA (9th ed.) Citation

Gregori I, papa. Registrum Epistularum Libri I-VII. Brepols, 1982.

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