@book{1185,
	author = {Hernández Sampieri, Roberto },
	title = {Metodología de la investigación / },
	publisher = {McGraw-Hill Interamericana,},
	year = {2006},
	address = {Distrito Federal : },
	edition = {4ª. edición},
	url = {https://www.academia.edu/31870211/Sampieri_et_al_metodologia_de_la_investigacion_4ta_edicion_sampieri}
}