एपीए उद्धरण

Watkins, J. (2004). Across the Board: The Mathematics of Chessboard Problems. UP.

शिकागो स्टाइल उद्धरण

Watkins, John. Across the Board: The Mathematics of Chessboard Problems. UP, 2004.

एमएलए उद्धरण

Watkins, John. Across the Board: The Mathematics of Chessboard Problems. UP, 2004.