Allen, Michael
Blackstone Press Ltd., s.a.
Buku Teks
Jaffe, Louis L., author
Little, Brown, 1968
Buku Teks
Tracey, Richard R.S., author
Butterworth, 1975
Buku Teks
Kauper, Paul G., author
Little, Brown, 1971
Buku Teks
Barrett, Edward L., author
Foundation Press, 1977
Buku Teks