@book{399,
	author = {Hernández-Sampieri, Roberto, and Mendoza Torres, Christian Paulina},
	title = {Metodología de la investigación /},
	publisher = {McGraw-Hill Interamericana Editores,},
	year = {2014.},
	address = {México :},
	edition = {6° edición.},
	note = {Incluye índice.}
}