MLA

Penitential Psalms and Litany. 0AD. https://collections.library.yale.edu/catalog/16371242.

APA, 6th edition

Penitential psalms and litany. (0 C.E.). [Prayers and devotions, Drawings (visual works) England 15th century, Manuscripts, Medieval England 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/16371242.