APA (7th ed.) Citation

Gregori I, p. (1849). Sancti Gregorii papae I. Regula pastoralis. Typis S. Congregationis de Propaganda Fide.

Chicago Style (17th ed.) Citation

Gregori I, papa. Sancti Gregorii Papae I. Regula Pastoralis. Romae [Roma]: Typis S. Congregationis de Propaganda Fide, 1849.

MLA (9th ed.) Citation

Gregori I, papa. Sancti Gregorii Papae I. Regula Pastoralis. Typis S. Congregationis de Propaganda Fide, 1849.

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