@book{41243,
	author = {Zill, Dennis G. and Abad González, María del Carmen},
	title = {Precálculo  con avances de cálculo},
	publisher = {McGraw-Hill},
	year = {2012},
	address = {México D.F. (México)},
	edition = {5a Ed},
	note = {Incluye índice analítico}
}