@book{93148,
	author = {Piattini Velthuis, Mario G.,},
	title = {Calidad de servicios :},
	publisher = {Ra-Ma,},
	year = {[2019]},
	address = {Paracuellos de Jarama, Madrid :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/110162/}
}