@book{3335,
	author = {Hernández Sampieri, RobertoFernández Collado, Carlos Baptista Lucio, Pilar},
	title = {Metodología de la investigación},
	publisher = {McGraw-Hill / Interamericana},
	year = {2014},
	address = {México D.F.},
	edition = {6ª}
}