@book{6515,
	author = {Sánchez, Gonzalo and Peñaranda, Ricardo },
	title = {Pasado y presente de la violencia en Colombia},
	publisher = {La Carreta Editores},
	year = {2007},
	series = {La Carreta Histórica},
	address = {Medellín, Colombia},
	edition = {Tercera edición}
}