@book{21131,
	author = {Escobar Rivera, Javier Alexander and Quintero, Donal},
	title = {Guía interactiva para presentación de portafolio /},
	publisher = {Corporación Unificada Nacional de Educación Superior,},
	year = {2005.},
	address = {Bogotá (Colombia) :},
	edition = {                   }
}