Koop, S. E. (1998). We hold this treasure: The story of Gillette Children's Hospital. Afton Historical Society Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKoop, Steven E. We Hold This Treasure: The Story of Gillette Children's Hospital. Afton, Minn.: Afton Historical Society Press, 1998.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKoop, Steven E. We Hold This Treasure: The Story of Gillette Children's Hospital. Afton Historical Society Press, 1998.
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