Brown, N. M. (2015). Ivory Vikings: The mystery of the most famous chessmen in the world and the woman who made them (First edition.). St. Martin's Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBrown, Nancy Marie. Ivory Vikings: The Mystery of the Most Famous Chessmen in the World and the Woman Who Made Them. First edition. New York: St. Martin's Press, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBrown, Nancy Marie. Ivory Vikings: The Mystery of the Most Famous Chessmen in the World and the Woman Who Made Them. First edition. St. Martin's Press, 2015.
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