Kammen, Douglas, author
Equinox Publishing (Asia), 2010
Buku Teks
Jurgen Ruland, Maria-Gabriela Manea, Hans Born, editors
[Springer, ], 2013
eBooks
Schwarz, Adam, author
Allen & Unwin, 1994
Buku Teks
Indonesia. Directorate General of Tourism
Wahyu Promospirit, 1990
Buku Referensi
Silverstein, Josef, author
Cornell University Press, 1977
Buku Teks