National Geographic Society (U.S.). (2015). An uncommon history of common things, Volume 2. National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Geographic Society (U.S.). An Uncommon History of Common Things, Volume 2. Washington, District of Columbia: National Geographic, 2015.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNational Geographic Society (U.S.). An Uncommon History of Common Things, Volume 2. National Geographic, 2015.
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