@book{8306,
	author = {Hernández Sampieri, Roberto and Baptista Lucio, Pilar, },
	title = {Metodología de la investigación /},
	publisher = {McGraw Hill, },
	year = {c1998},
	address = {México :},
	edition = {2 ed.},
	url = {https://www.cicy.mx/sitios/sib/doctoelectronico/9023.pdf}
}