Dahm, Bernhard
Cornell University Press, 1969
Buku Teks
Comber, Leon
Institute of South East Asia Studies, 2015
eBooks
J.J. Raj
MPH Group, 2007
Buku Teks
Bhardwaj, K.K.
ABC Publishing House, 1989
Buku Teks
Yefimor, D
Sterling Publisher Prt Ltd, 1975
Buku Teks