MLA

Book of Hours (Fragments). 0AD. https://collections.library.yale.edu/catalog/9998914.

APA, 6th edition

Book of Hours (fragments). (0 C.E.). [Prayers and devotions, Books of hours, Manuscripts, Medieval France 15th century, Manuscripts, Medieval France 16th century, Medieval and Renaissance Manuscript Fragments in Beinecke Library, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/9998914.