Cite

Almagest, etc

MLA

Ptolemy, active 2nd century. Almagest, etc. [between 1475 and 1500]. https://collections.library.yale.edu/catalog/11150271.

APA, 6th edition

Ptolemy, active 2nd century. ([between 1475 and 1500])[Almagest, etc]. https://collections.library.yale.edu/catalog/11150271.