Branner, Robert
George Braziller, 1961
Buku Teks
Bony, Jean
University of California Press, 1983.
Buku Teks
Botting, Fred
Routledge , 1996
Buku Teks
McKenzie, Bertha
University of Sydney, 1989
Buku Referensi
Radding, Charles M.
Yale University Press, 1991
Buku Teks