MLA

Paul, the Deacon, approximately 720-799?. Homiliarium, pars hiemalis. [ca. 900]. https://collections.library.yale.edu/catalog/2042299.

APA, 6th edition

Paul, the Deacon, approximately 720-799?. ([ca. 900])[Homiliarium, pars hiemalis]. https://collections.library.yale.edu/catalog/2042299.