Shea, T. (2015). Unbreakable: A Navy SEAL's way of life (First hardcover edition.). Little, Brown and Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रShea, Thom. Unbreakable: A Navy SEAL's Way of Life. First hardcover edition. New York: Little, Brown and Company, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रShea, Thom. Unbreakable: A Navy SEAL's Way of Life. First hardcover edition. Little, Brown and Company, 2015.
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