Powell-Smith, Vincent
Butterworth, 1995
Buku Teks
Jaffe, Louis L., author
Little, Brown, 1972
Buku Teks
Franklin, Marc A., author
The Foundation Press, 1979
Buku Teks
Chan, Wing Cheong
LexixNexix, 2005
Buku Teks
Lowenfeld, Andreas F.
Matthew Bender and Company,Inc., 1972
Buku Teks