Cobban, Alfred
Collins Clear-Type Press, 1969
Buku Teks
Rivera, Temario C.
Institute of Southeast Asia studies, 1996
Buku Teks
Artikel Jurnal
Pawakapan, Phuangthong R.
Institute of South East Asia Studies, 2013
eBooks
Adrian, Charles R.
Mc Graw-Hill, 1976
Buku Teks