Freeman, H. R., & Longanecker, G. W. (1979). The International Ultraviolet Explorer: Case study in spacecraft design. Goddard Space Flight Center.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFreeman, H. R., और G. W. Longanecker. The International Ultraviolet Explorer: Case Study in Spacecraft Design. Greenbelt, Md.: Goddard Space Flight Center, 1979.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFreeman, H. R., और G. W. Longanecker. The International Ultraviolet Explorer: Case Study in Spacecraft Design. Goddard Space Flight Center, 1979.
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