APA (7th ed.) Citation

Gregor, I., Zimmermann, O. J., & Gregor I. Papst 542-604. (1959). Dialogues. The fathers of the church.

Chicago Style (17th ed.) Citation

Gregor, I., Odo John Zimmermann, and Gregor I. Papst 542-604. "Dialogues." The Fathers of the Church 1959.

MLA (9th ed.) Citation

Gregor, I., et al. "Dialogues." The Fathers of the Church, 1959.

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