MLA

Rufus, Curtius. Historia Alexandri Magni, Etc. 0AD. https://collections.library.yale.edu/catalog/11173515.

APA, 6th edition

Rufus, C. (0 C.E.). Historia Alexandri Magni, etc [Translations, Manuscripts, Medieval, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/11173515.