Society, A. M. (2009). Proceedings of the American Mathematical Society. Volume 131, Number 12, 2003. American Mathematical Society.
Dyfyniad Arddull ChicagoSociety, American Mathematical. Proceedings of the American Mathematical Society. Volume 131, Number 12, 2003. American Mathematical Society, 2009.
Dyfyniad MLASociety, American Mathematical. Proceedings of the American Mathematical Society. Volume 131, Number 12, 2003. American Mathematical Society, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.