Hutchins, H. C. (1981). Examples of Commutative Rings. Passaic, New Jersey: Polygonal Publishing House.
Dyfyniad Arddull ChicagoHutchins, Harry C. Examples of Commutative Rings. Passaic, New Jersey: Polygonal Publishing House, 1981.
Dyfyniad MLAHutchins, Harry C. Examples of Commutative Rings. Passaic, New Jersey: Polygonal Publishing House, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.