@book{119756,
	author = {López Estrada, Francisco },
	title = {Poema del Cid /},
	publisher = {Editorial Castalia,},
	year = {1996.},
	address = {Madrid :},
	edition = {Duodécima edición },
	url = {http://www.loc.gov/catdir/enhancements/fy0836/80115140-d.html}
}