Morey, A. (2019). The 12 biggest breakthroughs in space technology. 12 Story Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMorey, Allan. The 12 Biggest Breakthroughs in Space Technology. Mankato, MN: 12 Story Library, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMorey, Allan. The 12 Biggest Breakthroughs in Space Technology. 12 Story Library, 2019.
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