Foster, George M., author
Brown and Comp, 1969
Buku Teks
the Dushken Publishing, 1974
Buku Teks
Cole, Johnnetta B., author
The Free Press, 1982
Buku Teks
edited by Iain R. Edgar and Andrew Russell
Routledge, 1998
Buku Teks
edited by Franz Boas
D.C. Heath, 1938
Buku Teks