@book{62993,
	author = {Roger Loppacher, Olga. and Buil Gazol, Pilar.},
	title = {Manual de comunicación ambiental :},
	publisher = {EUNSA,},
	year = {2014.},
	address = {Pamplona :},
	url = {https://elibro.net/ereader/politecnicointernacional/47171}
}