Cha-Am, 2002
Buku Referensi
Romein, Jan, author
University of California Press, 1962
Buku Teks
edited for the International Commission for a History of the Scientific and Cultural Development of Mankind by Guy S. Metraux and Francois Crouzet.
New American Library, 1965
Buku Teks
Panikkar, K.M., author
George Allen and Unwin, 1954
Buku Teks
Broeze, Frank J.A., author
[Publisher not identified], 1974
Buku Teks