@book{31262,
	author = {Sapag Chain, Nassir. and Sapag Chain, Reinaldo.},
	title = {Preparacion y evaluacion de proyectos /},
	publisher = {McGraw-Hill,},
	year = {2000.},
	address = {Santiago de Chile :},
	edition = {4a ed.},
	note = {Incluye bibliografias e indice.}
}