Parkman, Francis
The New American Library, 1961
Buku Teks
Cunningham, Charles C., author
Sterling and Francine Clark Art Institute, 1977
Buku Teks
Ashton, Gail
Routledge, 2000
Buku Teks
Sahukar, Mani
Dawn Horse Press, 1983
Buku Teks
Smidak, Emil F.
Avenira Foundation for Research of Human Society, 1996
Buku Teks