@book{35233,
	author = {Barnett, Raymond A.},
	title = {Precálculo :},
	publisher = {McGraw Hill,},
	year = {2000.},
	address = {Mexico :},
	edition = {4a ed.},
	note = {Incluye apendice e indice\ Titulo original. Precalculus: Functions and graphs.}
}