@book{227043,
	author = {Hernández Díaz, Fabio. and e-libro, Corp.},
	title = {Metodología del estudio},
	publisher = {McGraw-Hill Interamericana},
	year = {1996.},
	address = {México},
	edition = {2a. ed.},
	url = {http://site.ebrary.com/lib/pucpr/Doc?id=10436547}
}