MLA

Book of Hours (Fragment). 0AD. https://collections.library.yale.edu/catalog/16371269.

APA, 6th edition

Book of hours (fragment). (0 C.E.). [Early works to 1800, Books of hours, Manuscripts, Medieval Belgium 15th century, Medieval and Renaissance Manuscript Fragments in Beinecke Library, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/16371269.