@book{211845,
	author = {Parker, Geoffrey,},
	title = {La guerra de los treinta años},
	publisher = {A. Machado Libros},
	year = {2004.},
	address = {Madrid},
	edition = {2nd ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0649/97143765-d.html}
}