Kostyal, K. M. (2014). Founding fathers: The fight for freedom and the birth of America. National Geographic Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKostyal, K. M. Founding Fathers: The Fight for Freedom and the Birth of America. Washington, D.C.: National Geographic Books, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKostyal, K. M. Founding Fathers: The Fight for Freedom and the Birth of America. National Geographic Books, 2014.
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