Archiworld, [date of publication not identified]
Buku Referensi
Robert Maynard Hutchins, editor in chief
Encyclopaedia Britannica, Inc., 1952
Buku Referensi
Watson, James B.
American Anthropological Association, 1952
Buku Teks
edited by Joanna Banham, Leanda Shrimpton
Fitzroy Dearborn , 1997
Buku Referensi
by Albert P. Blaustein, Jay Sigler, Benjamin R. Beede, with Wayne E. Olson
Oceana Publications, 1977
Buku Referensi