Office for the Virgin Mary, Canticles (Breviary or Psalter) (fragment).
MLA
Office for the Virgin Mary, Canticles (Breviary or Psalter) (Fragment). 0AD. https://collections.library.yale.edu/catalog/2003650.
APA, 6th edition
Office for the Virgin Mary, Canticles (Breviary or Psalter) (fragment). (0 C.E.). [Manuscripts, Medieval Germany 12th century, Medieval and Renaissance Manuscript Fragments in Beinecke Library, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/2003650.