Franklin, Marc A., author
The Foundation Press, 1979
Buku Teks
Oppenheim, L.
Longmas, 1955
Buku Teks
Lord Tenterden, Charles, author
Professional Books, 1984
Buku Teks
edited by A. James Casner
Little, Brown, 1952
Buku Teks
Geldart, William, 1870-1922, author
Oxford University Press, 1991
Buku Teks