@book{8013,
	author = {Gutiérrez Pulido, Humberto and Vara Salazar, Román de la.},
	title = {Control estadístico de calidad y seis sigma /},
	publisher = { McGraw-Hill, },
	year = {2004},
	address = {México, D. F. : },
	edition = {Primera edición.},
	note = {Contiene índice. }
}