@book{33072,
	author = {Zill, Dennis G. and Dewar, Jacqueline M.},
	title = {Precálculo con avances de cálculo / },
	publisher = {McGraw Hill, },
	year = {2008.},
	address = {México : },
	edition = {4a. ed.},
	note = {Incluye índice.}
}