Berkeley : The University of California
Majalah, Jurnal, Buletin
Knaap, Gerrit
Leiden KITLV Press 2004
Buku Teks
The Press of Case Western Reserve University, 1972
Buku Teks
The Press of Case Western Reserve University, 1973
Buku Teks
Willey, Basil, author
Penguin Books, 1962
Buku Teks