United States. National Aeronautics and Space Administration. History Office & Dick, S. J. (2007). America in space: NASA's first fifty years. Abrams.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnited States. National Aeronautics and Space Administration. History Office और Steven J. Dick. America in Space: NASA's First Fifty Years. New York: Abrams, 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnited States. National Aeronautics and Space Administration. History Office और Steven J. Dick. America in Space: NASA's First Fifty Years. Abrams, 2007.
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