West Publishing Co, 1987
Buku Teks
Whaley, Douglas J.
Little, Brown and Company, 1991
Buku Teks
Adelman, Martin J., author
Thomson/West, 2009
Buku Teks
Hamilton, Robert W., author
West Publishing, 1984
Buku Teks
Little, Joseph W., author
Thomson Reuters/West, 2010
Buku Teks