MLA

de Ratisbona, Henricus. Vocabularius Dictus Lucianus. 0AD. https://collections.library.yale.edu/catalog/2013986.

APA, 6th edition

de Ratisbona, H. (0 C.E.). Vocabularius dictus Lucianus [Early works to 1800, Manuscripts, Medieval Italy 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/2013986.