Gifford, E. W.
University of California Press, 1956
Buku Teks
Forlong, James G.
The Royal Asiatic Society, 1940
Buku Referensi
by Michael Leach... [and others]
Peter Lang, 2013
Buku Teks
Hesseline, William B.
Louisiana State university Press, 1949
Buku Teks
University of Alabama Press, 1945
Buku Teks