MLA

Demosthenes. Olynthica Tertia, Etc. 0AD. https://collections.library.yale.edu/catalog/10269829.

APA, 6th edition

D. (0 C.E.). Olynthica tertia, etc [Translations, Manuscripts, Medieval Italy 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/10269829.