APA (7th ed.) Citation

Gregorius Magister Anglicus ca. 12./13. Jh & Osborne, J. (1987). The marvels of Rome. Pontifical Institute of Mediaeval Studies.

Chicago Style (17th ed.) Citation

Gregorius Magister Anglicus ca. 12./13. Jh and John Osborne. The Marvels of Rome. Toronto: Pontifical Institute of Mediaeval Studies, 1987.

MLA (9th ed.) Citation

Gregorius Magister Anglicus ca. 12./13. Jh and John Osborne. The Marvels of Rome. Pontifical Institute of Mediaeval Studies, 1987.