@book{31,
	author = {Goeldner, Charles R. and Ritchie, J. R. Brent.},
	title = {Turismo :},
	publisher = {Limusa Wiley :},
	year = {2011},
	address = {México :},
	edition = {3a ed.},
	note = {Traducción de: Tourism : principles, practices, philosophies}
}