@book{272,
	author = {Demana, Franklin D. and Waits, Bert K.},
	title = {Matemáticas universitarias introductorias con nivelador Mymathlab tutor interactivo online },
	publisher = {Pearson Educación , },
	year = {2009.},
	address = {México, D.F : },
	note = {"Tutor interactivo online"--Cubierta.}
}