Cita APA (7a ed.)
Tolomeo, C., Copérnico, N., Kepler, J., & Hutchins, R. M. The Almagest / On the Revolutions of the Heavenly Spheres / The Harmonies of the World. Encyclopaedia Britannica.
Cita estilo Chicago (17a ed.)
Tolomeo, Claudio, Nicolás Copérnico, Johannes Kepler, y Robert Maynard Hutchins. The Almagest / On the Revolutions of the Heavenly Spheres / The Harmonies of the World. Chicago, EUA: Encyclopaedia Britannica.
Cita MLA (9a ed.)
Tolomeo, Claudio, et al. The Almagest / On the Revolutions of the Heavenly Spheres / The Harmonies of the World. Encyclopaedia Britannica.
Precaución: Estas citas no son 100% exactas.