Ivamy, E.R. Hardy
Butterworth, 1995
Buku Teks
Powell-Smith, Vincent
Butterworth, 1995
Buku Teks
Schlesinger, Rudolf B.
The Foundation Press, 1950
Buku Teks
Kauper, Paul G., author
Little, Brown, 1971
Buku Teks
Dine, Janet, author
Blackstone Press, 1993
Buku Teks