@book{33162,
	author = {Clement, Norris C. and Pool, John Charles.},
	title = {Economia enfoque :},
	publisher = {McGraw Hill Interamericana,},
	year = {1991.},
	address = {Mexico :},
	edition = {3a ed.},
	note = {Incluye indice\Notas al pie del texto.}
}