Ward, Barbara, author
Norton & Comp , 1957
Buku Teks
Direktorat Jendral Sejarah dan Purbakala, [date of publication not identified]
Buku Referensi
Toynbee, Arnold J., author
Oxford University Press, 1957
Buku Teks
Humas Pemkab Kutai Barat, 2008
Buku Referensi
Carpenter, Allan, author
Facts On File, 1990
Buku Referensi