@book{22556,
	author = {Hernández Sampieri, Roberto, and Fernández Collado, Carlos,},
	title = {Metodología de la investigación /},
	publisher = {McGraw-Hill,},
	year = {2003.},
	address = {México :},
	edition = {3a ed.},
	note = {Incluye índice analítico e índice onomástico.}
}