@book{122090,
	author = {Casanova Ruiz, Julián,  and Gil Andrés, Carlos, },
	title = {Breve historia de España en el siglo XX /},
	publisher = {Editorial Ariel,},
	year = {2012.},
	series = {Historia},
	address = {Barcelona :},
	edition = {1a edición.},
	url = {http://www.loc.gov/catdir/enhancements/fy1215/2012423998-b.html}
}