Cita APA (7a ed.)

Ryan, J. J., & Kuttner, S. (1956). Saint Peter Damiani and his canonical sources: A preliminary study in the antecedents of the Gregorian Reform. Pontifical Institute of Mediaeval Studies.

Cita Chicago Style (17a ed.)

Ryan, John J., y Stephan Kuttner. Saint Peter Damiani and His Canonical Sources: A Preliminary Study in the Antecedents of the Gregorian Reform. Toronto: Pontifical Institute of Mediaeval Studies, 1956.

Cita MLA (9a ed.)

Ryan, John J., y Stephan Kuttner. Saint Peter Damiani and His Canonical Sources: A Preliminary Study in the Antecedents of the Gregorian Reform. Pontifical Institute of Mediaeval Studies, 1956.