MLA

Book of Hours (Fragment). 0AD. https://collections.library.yale.edu/catalog/2004116.

APA, 6th edition

Book of Hours (fragment). (0 C.E.). [Prayers and devotions, Books of hours, Manuscripts, Medieval France 15th century, Medieval and Renaissance Manuscript Fragments in Beinecke Library, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/2004116.