Kauper, Paul G., author
Little, Brown, 1966
Buku Teks
Gunther, Gerald, author
Foundation Press, 1970
Buku Teks
Allen, Michael
Blackstone Press Ltd., s.a.
Buku Teks
Smith, Christopher E.
Nelson-Hall Publishers, 1992
Buku Teks
by Paul A. Freund [and others]
Little, Brown, 1966
Buku Teks