Wichmann, Siegfried, author
Thames & Hudson, 1999
Buku Referensi
Ecke, Gustav.
Harvard University Press, 1935.
Buku Teks
Ewers, John C.
Smithsonian Institution, 1957
Buku Teks
edited by Margaret J. Kartomi ... [et.al.]
Monash University, 1981
Buku Teks
Artikel Jurnal