MLA

Tacitus, Cornelius. Annales and Historiae. 0AD. https://collections.library.yale.edu/catalog/17356248.

APA, 6th edition

Tacitus, C. (0 C.E.). Annales and historiae [Manuscripts, Medieval Italy 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/17356248.