Harland, Bryce
Institute of Southeast Asian Studies , 1996
Buku Teks
Millard, Thomas F.
George Allen and Unwin, 1924
Buku Teks
Hornbeck, Stanley K., author
World Peace Foundation, 1942
Buku Teks
Levy, Roger, author
International Secretariat, Institute of Pacific Relations, 1941
Buku Teks
edited by Robert S. Ross
Institute of Southeast Asian Studies, 1995
Buku Teks