Robert Storey ... [and others]
Lonely Planet , 1992
Buku Referensi
Clewlow, Carol
Lonely Planet, 1989
Buku Referensi
Amos, Julie-Ann
howtobooks, 2002
Buku Teks
Covernton, Mary
Leonely Planet Pub., 1984
Buku Teks
Gallagher, Richard S.
[American Management Association, ], 2013
eBooks