MLA

Caesar, Julius. Bellum Gallicum. 0AD. https://collections.library.yale.edu/catalog/10269807.

APA, 6th edition

Caesar, J. (0 C.E.). Bellum Gallicum [Translations, Manuscripts, Medieval Italy 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/10269807.