Bridgman, R. (2020). 1,000 inventions & discoveries (Fourth edition, American edition.). DK Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBridgman, Roger. 1,000 Inventions & Discoveries. Fourth edition, American edition. New York, NY: DK Publishing, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBridgman, Roger. 1,000 Inventions & Discoveries. Fourth edition, American edition. DK Publishing, 2020.
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