@book{237263,
	author = {Calvo-Pérez, J.},
	title = {Teoría y práctica del contacto  :},
	publisher = {Iberoamericana ;},
	year = {2000.},
	series = {Lengua y sociedad en el mundo hispánico =},
	address = {Madrid :},
	url = {https://www.digitaliapublishing.com/a/21023/}
}