APA Zitierstil

Gregor I. Papst 542-604, Martyn, J. R. C., & Pontifical Institute of Mediaeval Studies. (2004). The letters of Gregory the Great Books 1 - 4. Pontifical Institute of Mediaeval Studies.

Chicago Zitierstil

Gregor I. Papst 542-604, John R. C. Martyn, und Pontifical Institute of Mediaeval Studies. The Letters of Gregory the Great Books 1 - 4. Toronto: Pontifical Institute of Mediaeval Studies, 2004.

MLA Zitierstil

Gregor I. Papst 542-604, et al. The Letters of Gregory the Great Books 1 - 4. Pontifical Institute of Mediaeval Studies, 2004.