Sagan, C. (2011). The demon-haunted world: Science as a candle in the dark.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSagan, Carl. The Demon-haunted World: Science as a Candle in the Dark. 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSagan, Carl. The Demon-haunted World: Science as a Candle in the Dark. 2011.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.