Koch, Charles H.
The Michie Company Law Publishers, 1991
Buku Teks
Jaffe, Louis L., author
Little, Brown, 1968
Buku Teks
Tracey, Richard R.S., author
Butterworth, 1975
Buku Teks
Allen, Michael
Blackstone Press Ltd., s.a.
Buku Teks
Jaffe, Louis L., author
Little, Brown, 1972
Buku Teks