APA Citation

Πτολεμαίος (2ος αι.), & Kepler, J. Epitome of Copernican astronomy, the harmonies of the world. Chicago: Encyclopaedia Britannica.

Chicago Style Citation

Πτολεμαίος (2ος αι.), and Johannes Kepler. Epitome of Copernican Astronomy, the Harmonies of the World. Chicago: Encyclopaedia Britannica.

MLA Citation

Πτολεμαίος (2ος αι.), and Johannes Kepler. Epitome of Copernican Astronomy, the Harmonies of the World. Chicago: Encyclopaedia Britannica.

Warning: These citations may not always be 100% accurate.