@book{6795,
	author = {Hernández Sampieri, Roberto and Carlos Fernández Collado II.Pilar Batista LucianoÌ},
	title = {Metodología de la invetigación / Roberto Hernández Sampieri, Carlos Fernández Collado y Pilar Batista Luciano},
	address = {México : McGraw-Hill},
	edition = {3}
}