@book{5806,
	author = {Betancourt Echeverry, Dario},
	title = {Enseñanza de la historia a tres niveles :},
	publisher = {Cooperativa Edutorial Magisterio,},
	year = {2005.},
	series = {Colección Mesa Redonda},
	address = {Bogotá :},
	edition = {2a ed.}
}