@book{184949,
	author = {Barnett, Raymond A. and Ziegler, Michael R.},
	title = {Precalculus},
	publisher = {McGraw Hill},
	year = {2001.},
	series = {Barnett, Ziegler & Byleen's precalculus series.},
	address = {Boston},
	edition = {5th ed.},
	note = {ESTE LIBRO INCLUYE UN DISCO}
}