APA (7th ed.) Citation

Sagan, C. (1997). The demon-haunted world: Science as a candle in the dark. Headline Book Publishing.

Chicago Style (17th ed.) Citation

Sagan, Carl. The Demon-haunted World: Science as a Candle in the Dark. London: Headline Book Publishing, 1997.

MLA (8th ed.) Citation

Sagan, Carl. The Demon-haunted World: Science as a Candle in the Dark. Headline Book Publishing, 1997.