@book{45843,
	author = {Larson, Roland E. and Heyd, David E.},
	title = {Algebra and trigonometry.},
	publisher = {D.C. Heath and Co., },
	year = {c1993.},
	address = {Lexington, Mass.},
	edition = {3rd ed.},
	note = {Incluye indice.}
}