Black, A. (2019). Scientists who changed history (First American edition.). DK Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBlack, Alexandra. Scientists Who Changed History. First American edition. New York, NY: DK Publishing, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBlack, Alexandra. Scientists Who Changed History. First American edition. DK Publishing, 2019.
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