edited by Clauspeter Hill, Jochen Hoerth
Konrad-Adenauer-Stiftung, 2008
Buku Teks
Coedes, George
Univesity of California Press, 1969
Buku Teks
London : IP Publishing Ltd
Majalah, Jurnal, Buletin
Hall, D.G.E.
Macmillan, 1970
Buku Teks
Hall, D.G.E.
Macmillan, 1968
Buku Teks