MLA

Aristotle. Ethica. 0AD. https://collections.library.yale.edu/catalog/11034895.

APA, 6th edition

A. (0 C.E.). Ethica [Early works to 1800, Translations, Manuscripts, Medieval Italy 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/11034895.