Harris, Phil, author
Weidenfeld and Nicolson, 1993
Buku Teks
Williams, Glanville
Stevens & Sons, 1963
Buku Teks
Holmes, Oliver Wendell, Jr.
Little, Brown and Company, 1951
Buku Teks
Jennings, Ivor, Sir, 1903-1965, author
Hodder and Stoughton, 1979
Buku Teks
Haar, Charles M., author
Little, Brown, 1977
Buku Teks