HRADESKY,J.L. (1985). PRODUCTIVITY & QUALITY IMPROVEMENT. MCGRAW HILL.
Dyfyniad Arddull ChicagoHRADESKY,J.L. PRODUCTIVITY & QUALITY IMPROVEMENT. NEW YORK: MCGRAW HILL, 1985.
Dyfyniad MLAHRADESKY,J.L. PRODUCTIVITY & QUALITY IMPROVEMENT. MCGRAW HILL, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.