@book{68513,
	author = {Martínez Polo, Josep M. and Martínez Polo, Josep M.},
	title = {Marketing digital :},
	publisher = {Universitat Oberta de Catalunya, },
	year = {2015},
	address = {[Madrid, España] :},
	url = {https://public.digitaliapublishing.com/a/43843}
}