Watkins, J. (2004). Across the Board: The Mathematics of Chessboard Problems. UP.
Chicago Edition CitationWatkins, John. Across the Board: The Mathematics of Chessboard Problems. UP, 2004.
Cita MLAWatkins, John. Across the Board: The Mathematics of Chessboard Problems. UP, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.