@book{105423,
	author = {Orrego Lombana, Gerardo,},
	title = {Contratación estatal :},
	publisher = {Universidad Católica Luis Amigó,},
	year = {2016.},
	address = {Medellín, Antioquia, Colombia :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/155242/}
}