Griffith, William E., author
MIT Press, 1965
Buku Teks
Boyle, Peter G., author
Routledge, 1993
Buku Teks
Dallin, David J., author
Hollis & Carter, 1951
Buku Teks
Dallin, David J., author
Yale University Press, 1956
Buku Teks
Mosely, Philip E.
Vintage Books, 1960
Buku Teks