@book{2189,
	author = {Spengler, Oswald},
	title = {La decadencia de occidente : },
	publisher = {Espasa Calpe, },
	year = {1976.},
	series = {Historia y Filosofía de la Ciencia.},
	address = {Madrid : },
	edition = {12da.ed.},
	note = {Notas a pié de página.}
}