Hamilton, Robert W., author
Little, Brown, 1993
Buku Teks
McCormack, Mark H., author
Beech Tree Books, 1987
Buku Teks
White, James J., author
West Publishing Company, 1995
Buku Teks
White, James J., author
West Publishing Company, 1988
Buku Teks
Hall, Alvin D., author
Prentice-Hall, 1990
Buku Teks