MLA

Augustine, of Hippo, Saint, 354-430. Enarrationes in Psalmos. [between 1100 and 1200]. https://collections.library.yale.edu/catalog/9998964.

APA, 6th edition

Augustine, of Hippo, Saint, 354-430. ([between 1100 and 1200])[Enarrationes in Psalmos]. https://collections.library.yale.edu/catalog/9998964.