@book{42006,
	author = {Sarmiento Guede, José Ramón,},
	title = {Marketing de relaciones :},
	publisher = {Dykinson, S.L.,},
	year = {2015.},
	series = {Colección Nuevos mercados},
	address = {Madrid :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/40620/}
}