JOHNSON, L. M. (1994). Elementary algebra. Harper Collins College Publishers.
Dyfyniad Arddull ChicagoJOHNSON, L. Murphy. Elementary Algebra. Harper Collins College Publishers, 1994.
Dyfyniad MLAJOHNSON, L. Murphy. Elementary Algebra. Harper Collins College Publishers, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.