Henn, Harry G., author
West Publishing, 1961
Buku Teks
Henn, Harry G., author
West Publishing, 1970
Buku Teks
Eisenberg, Melvin A., author
Little, Brown, 1976
Buku Teks
Soderquist, Larry D.
The Michie Company, 1991
Buku Teks
Herwitz, David R., author
Foundation Press, 1966
Buku Teks