MLA

Untitled French Romance. 13AD. https://collections.library.yale.edu/catalog/2003112.

APA, 6th edition

Untitled French romance. (13 C.E.). [Manuscripts, Medieval France 13th century, Medieval and Renaissance Manuscript Fragments in Beinecke Library, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/2003112.