Price, Roger, author
Routledge, 1997
Buku Teks
edited by William E. Griffith
Lexington Books, 1976
Buku Teks
Coupland, R., author
McMillan, 1935
Buku Teks
Hearnshaw, F.J.C., author
G.G. Harrap, 1940
Buku Teks
Odom, William E., author
Yale University Press, 2004
Buku Teks