MLA

of Tournai, William. Flores Bernardi. 0AD. https://collections.library.yale.edu/catalog/2042290.

APA, 6th edition

of Tournai, W. (0 C.E.). Flores Bernardi [Early works to 1800, Manuscripts, Medieval France 13th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/2042290.