@book{35722,
	author = {Sapag Chain, Nassir, and Sapag Chain, Reinaldo,},
	title = {Preparacion y evaluacion de proyectos /},
	publisher = {McGraw-Hill Interamericana,},
	year = {2014.},
	series = {McGraw-Hill Education},
	address = {Mexico, D.F. :},
	edition = {6a edicion.},
	url = {http://www.ebooks7-24.com/?il=752}
}