@book{5610,
	author = {Parker, R. A. C and Maestre, Joaquín},
	title = {El siglo XX, I},
	publisher = {Siglo XXI },
	year = {2004},
	series = {Historia universal siglo XXI},
	address = {Madrid},
	edition = {9a. edición },
	note = {Incluye índice y bibliografía}
}