Lewis, Oscar, author
Universtiy of Washington Press, 1942
Buku Teks
Mackintosh, A.S.
Cambridge University Press , 1963
Buku Teks
Tan Ta Sen, author
2007
UI - Disertasi (Membership)
Thurnwald, Richard C.
George Routledge and Sons, 1935
Buku Teks
Wilson, Paul R., author
George Allen and Unwin, 1982
Buku Teks