Leslie, Douglas L., author
West Publishing, 1992
Buku Teks
Willbrown, Steven L., author
Michie Law, 1995
Buku Teks
Harper, Michael C
Little, Brown and Company, 1996
Buku Teks
Gould, William B., IV, author
MIT Press, 1982
Buku Teks
Law Center, 1976
Buku Teks