@book{40023,
	author = {Álvarez Pinzón, Gloria Lucía, and Camacho Gutíerrez, Andrea del Pilar,},
	title = {Servicios Públicos y Medio Ambiente.},
	publisher = {Universidad Externado de Colombia,},
	year = {2007.},
	address = {Bogotá D.C, Colombia :},
	edition = {1.},
	note = {Incluye Indice.}
}