Woolley, Leonard

Penguin Books , 1965

 Buku Teks

Dani, A.H.

Centre for East Asian Cultural Studies ; Paris, France : United Nations Educational, Scientific and Cultural Organization, 1988.

 Buku Teks

Gifford, E. W.

University of California Press, 1956

 Buku Teks

Brion, Marcel, 1895-1984

Macmillan, 1961

 Buku Teks SO

Thapar, B.K.

Unesco, 1985

 Buku Teks