Little,Brown and Company, 1975
Buku Teks
Whaley, Douglas J.
Little, Brown and Company, 1991
Buku Teks
West Publishing Co, 1987
Buku Teks
Gilreath, Shannon, 1977-
Thomson/West, 2007
Buku Teks
Hamilton, Robert W., author
West Publishing, 1984
Buku Teks