Catoptrica, etc
MLA
Euclid. Catoptrica, Etc. 1541. https://collections.library.yale.edu/catalog/16427805.
APA, 6th edition
E. (1541). Catoptrica, etc [Manuscripts, Renaissance Italy 16th century, Medieval and Renaissance Manuscripts in Beinecke Library]. https://collections.library.yale.edu/catalog/16427805.