@book{12195,
	author = {Echeverri Echeverri, Rubén Darío. and Franco Montoya, Luz Marina.},
	title = {Pensamiento sistémico : },
	publisher = {Instituto Tecnológico Metropolitano, },
	year = {2010.},
	series = {Serie textos académicos},
	address = {Medellín : }
}