Cite

Decretales (fragment).

MLA

Gregory IX, Pope, approximately 1170-1241. Decretales (fragment).. [between 1250 and 1299].. https://collections.library.yale.edu/catalog/2004066.

APA, 6th edition

Gregory IX, Pope, approximately 1170-1241. ([between 1250 and 1299].)[Decretales (fragment).]. https://collections.library.yale.edu/catalog/2004066.