@book{5640,
	author = {Gutiérrez Pulido, Humberto and Vara Salazar, Román de la.},
	title = {Control estadístico de la calidad y seis sigma /},
	publisher = {Mcraw  Hill  Interamericana  S.A., },
	year = {2013},
	address = {México, D. F. :},
	edition = {Tercera edición },
	note = { 	Contiene índice. }
}