Cita APA (7a ed.)
(1970). Motion in the heavens. Holt, Rinehart and Winston.
Cita Chicago Style (17a ed.)
Motion in the Heavens. New York, Toronto: Holt, Rinehart and Winston, 1970.
Cita MLA (9a ed.)
Motion in the Heavens. Holt, Rinehart and Winston, 1970.
Precaución: Estas citas no son 100% exactas.