@book{8391,
	author = {Hernández Sampieri, Roberto. and Fernández Collado, Carlos.},
	title = {Metodología de la Investigación /},
	publisher = {McGraw Hill Interamericana,},
	year = {2006.},
	address = {Bogotá :},
	edition = {4a ed.},
	note = {Incluye índice analítico.}
}