@book{9446,
	author = {Barnett, Raymond A. - - and Barnett, Raymond A.},
	title = {Precálculo},
	publisher = {McGraw-Hill,},
	year = {c2011.},
	series = {Barnett, Ziegler & Byleen's precálculo},
	address = {México:},
	edition = {7a.},
	note = {Incluye índice.}
}