@book{86432,
	author = {Valverde, Nuria.},
	title = {Un mundo en equilibrio :},
	publisher = {Marcial Pons Ediciones de Historia :},
	year = {2012.},
	series = {Ambos mundos},
	address = {Madrid :},
	url = {http://www.loc.gov/catdir/enhancements/fy1307/2012428597-d.html}
}