MLA

Africanus, Sextus Julius. Cestoi. 0AD. https://collections.library.yale.edu/catalog/10269754.

APA, 6th edition

Africanus, S. J. (0 C.E.). Cestoi [Early works to 1800, Early works to 1600, Manuscripts, Medieval Italy 16th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/10269754.