MLA

Josephus, Flavius. De Bello Judaico. 0AD. https://collections.library.yale.edu/catalog/16870305.

APA, 6th edition

Josephus, F. (0 C.E.). De bello Judaico [Manuscripts, Medieval France 12th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/16870305.