@book{33369,
	author = {Ponterio Vitale, Sergio. and Molina y Vedia, Eduardo Lucas,},
	title = {Metodología en el turismo /},
	publisher = {Editorial Trillas,},
	year = {1991.},
	series = {Serie Trillas turismo},
	address = {Mexico :},
	note = {Titulo original. Turismo e ricerca scientifica.}
}