editor Andi Hamzah
Galia Indonesia, 1987
Buku Teks
Minstry Foreign Affairs, [date of publication not identified]
Buku Teks
Arpornsuwan, Thanet, author
Friedrich-Ebert Stiftung , 1978
Buku Teks
Artikel Jurnal
Macdonald, Phil, author
National Geographic, 2009
Buku Teks