Summa decretorum (fragment).
MLA
Rufinus, Archbishop of Sorrento, active 12th century. Summa decretorum (fragment).. approximately 1160-approximately 1180.. https://collections.library.yale.edu/catalog/16371263.
APA, 6th edition
Rufinus, Archbishop of Sorrento, active 12th century. (approximately 1160-approximately 1180.)[Summa decretorum (fragment).]. https://collections.library.yale.edu/catalog/16371263.