@book{262604,
	author = {Matallana Camacho, Ernesto,},
	title = {Manual de contratación de la administración pública :},
	publisher = {Universidad Externado de Colombia,},
	year = {[2015]},
	address = {Bogotá :},
	edition = {4a. edición.},
	url = {https://www.digitaliapublishing.com/a/68684/}
}