Livre du roy Modus, etc
MLA
Livre Du Roy Modus, Etc. 0AD. https://collections.library.yale.edu/catalog/10712709.
APA, 6th edition
Livre du roy Modus, etc. (0 C.E.). [Manuscripts, Medieval France 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/10712709.