@book{1938,
	author = {Sorel, Georges Eugene, 1847-1922},
	title = {Reflexiones sobre la violencia},
	publisher = {Librería Española y Extranjera},
	year = {1912},
	address = {Madrid},
	edition = {3 ed.},
	url = {http://disenso.info/wp-content/uploads/2013/06/Reflexiones-Sobre-la-Violencia-G.-Sorel-.pdf}
}