@book{94456,
	author = {Gratius, Susanne,},
	title = {Mercosur y NAFTA :},
	publisher = {Iberoamericana ;},
	year = {2008.},
	address = {Madrid :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/112859/}
}