Sagan, C. (2011). The demon-haunted world: Science as a candle in the dark.
Cita Chicago Style (17a ed.)Sagan, Carl. The Demon-haunted World: Science as a Candle in the Dark. 2011.
Cita MLA (8a ed.)Sagan, Carl. The Demon-haunted World: Science as a Candle in the Dark. 2011.
Precaución: Estas citas no son 100% exactas.