Slossberg, Lynn T.
West Legal Studies, 1999
Buku Teks
Marsh, Lucy Allen
Little, Brown and Company, 1992
Buku Teks
Burke, D. Barlow
The Michie Company, 1993
Buku Teks
American Bar Association, 1974
Buku Teks
Anderson, Janette J.
Prentice-Hall, 1997
Buku Teks