Jurgen Ruland, Maria-Gabriela Manea, Hans Born, editors
[Springer, ], 2013
eBooks
Schwarz, Adam
Allen & Unwin, 1994
Buku Teks
Silverstein, Josef
Cornell University Press, 1977
Buku Teks
Finer, S. E.
Frederick A. Praeger, 1962
Buku Teks
Indonesia. Directorate General of Tourism
Wahyu Promospirit, 1990
Buku Referensi