@book{2044,
	author = {Hernández Sampieri, Roberto.; Fernandes Collado, Carlos  &  Baptista Lucio, Pilar.},
	title = {Metodología de la Investigación./},
	publisher = {McGraw-Hill Interamericana;},
	year = {c2003.},
	address = {México:},
	edition = {Tercera.}
}