MLA

Pontifical. 0AD. https://collections.library.yale.edu/catalog/2026777.

APA, 6th edition

Pontifical. (0 C.E.). [Prayers and devotions, Manuscripts, Medieval England 10th century, Medieval and Renaissance Manuscript Fragments in Beinecke Library, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/2026777.