Honsberger, R. (2003). Mathematical diamonds. Mathematical Association of America.
Dyfyniad Arddull ChicagoHonsberger, Ross. Mathematical Diamonds. Rhode Island.: Mathematical Association of America, 2003.
Dyfyniad MLAHonsberger, Ross. Mathematical Diamonds. Mathematical Association of America, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.