Dalton, Bill, author
Odyssey Guides , 1991
Buku Referensi
Bank Bumi Daya
[publisher not identified], 1980
Buku Teks
Institute of Southeast Asian Studies, 1999
Buku Teks
The World Bank, 2004
Buku Teks
Grant, Bruce, 1925-, author
Penguin Books, 1967
Buku Teks