C.L. van Langenhuysen, 1918
Buku Teks
edited by David Koh Wee Hock
Institute of Southeast Asian Studies, 2007
Buku Teks
Routledge, 1992
Buku Teks
University of Technology Sydney
Lovell Johns , 1996
Buku Referensi
editorial information compiled by the Economist
The Economist Newspaper Limited, 1984
Buku Referensi