Institute of Southeast Asian Studies , 1992
Buku Teks
edited by Gun Lauritzson
Lund University, 1992
Buku Referensi
McCloud, Donald G., author
Westview Press, 1986
Buku Teks
NRI Nomura Research Institute , 1999
Buku Teks
Wong, Francis Hoy Kee
Heinemman Educational Books, 1973
Buku Teks