Watkins, J. J. (2004). Across the board: The mathematics of chessboard problems. Princeton University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWatkins, John J. Across the Board: The Mathematics of Chessboard Problems. Princeton: Princeton University Press, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWatkins, John J. Across the Board: The Mathematics of Chessboard Problems. Princeton University Press, 2004.
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