Goodrich, L. Carrington (Luther Carrington), 1894-, author
George Allen and Unwin, [Date of publication not identified]
Buku Teks
Spencer, Cornelia, author
Museum Press, 1947
Buku Teks
Bennet, Gordon, author
Westview, 1978
Buku Referensi
Powell, Ralph L.
Princeton University Press, 1955
Buku Teks
edited by Leo Suryadinata
ISEAS, 2006
Buku Teks