J. Dennis Hynes
West Publshing Co, 1997
Buku Teks
Eisenberg, Melvin A.
The Foundation Press, 1987
Buku Teks
Drake, Charles D.
Sweet & Maxwell, 1972
Buku Teks
Hynes, J. Dennis
Michie , 1996
Buku Teks
Kleinberger, Daniel S.
Little, Brown and Company, 1995
Buku Teks