@book{5217,
	author = {Brue, Greg and Barba, Enrique and Hay Group},
	title = {Seis Sigma para directivos.},
	publisher = {McGraw-Hil,},
	year = {2003.},
	series = {Directivos Hoy},
	address = {Madrid :},
	edition = {Mercedes Rico Grau}
}