APA (7th ed.) Citation

Iglesia Católica, Gregorio XIII, P., & Martinus Polonus, m. 1. (1582). Decretum Gratiani. In Aedibus Populi Romani.

Chicago Style (17th ed.) Citation

Iglesia Católica, Papa Gregorio XIII, and m. 1279 Martinus Polonus. Decretum Gratiani. Romæ: In Aedibus Populi Romani, 1582.

MLA (9th ed.) Citation

Iglesia Católica, et al. Decretum Gratiani. In Aedibus Populi Romani, 1582.

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