@book{197459,
	author = {Goeldner, Charles R. and Ritchie, J. R. Brent.},
	title = {Tourism},
	publisher = {WILEY},
	year = {2002.},
	address = {New York},
	edition = {9th ed.},
	url = {http://www.loc.gov/catdir/bios/wiley043/2002000779.html}
}