@book{227424,
	author = {Angel, Allen R. and Semmler, Richard.},
	title = {Algebra for college students},
	publisher = {Pearson Prentice Hall},
	year = {2008.},
	address = {Upper Saddle River, N.J.},
	edition = {3rd ed.},
	note = {ESTE LIBRO INCLUYE UN DISCO}
}