Sagan, C. (1997). The demon-haunted world: Science as a candle in the dark (1st Ballantine Books ed.). Ballantine Books.
Cita Chicago Style (17a ed.)Sagan, Carl. The Demon-haunted World: Science as a Candle in the Dark. 1st Ballantine Books ed. New York: Ballantine Books, 1997.
Cita MLA (8a ed.)Sagan, Carl. The Demon-haunted World: Science as a Candle in the Dark. 1st Ballantine Books ed. Ballantine Books, 1997.
Precaución: Estas citas no son 100% exactas.