Clegg, B. (2014). Final frontier: The pioneering science and technology of exploring the universe (First edition.). St. Martin's Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रClegg, Brian. Final Frontier: The Pioneering Science and Technology of Exploring the Universe. First edition. New York: St. Martin's Press, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रClegg, Brian. Final Frontier: The Pioneering Science and Technology of Exploring the Universe. First edition. St. Martin's Press, 2014.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.