MLA

Cicero, Marcus Tullius. Opera Philosophica. 1470. https://collections.library.yale.edu/catalog/10269865.

APA, 6th edition

Cicero, M. T. (1470). Opera philosophica [Early works to 1800, Manuscripts, Medieval Italy 15th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/10269865.