MLA

Treatise on Cardinal Virtues. 0AD. https://collections.library.yale.edu/catalog/9998586.

APA, 6th edition

Treatise on cardinal virtues. (0 C.E.). [Translations, Manuscripts, Medieval Italy 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/9998586.