Gutsch, W. A. (1998). 1001 things everyone should know about the universe. Doubleday.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGutsch, William A. 1001 Things Everyone Should Know About the Universe. New York: Doubleday, 1998.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGutsch, William A. 1001 Things Everyone Should Know About the Universe. Doubleday, 1998.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.