Simon, David R.
McGraw-Hill, 1995
Buku Teks
Kornblum, William, author
Prentice-Hall, 1992
Buku Teks
Curran, Daniel J., author
Allyn & Bacon, 1987
Buku Teks
Parrillo, Vincent N., author
John Wiley & Sons, 1985
Buku Teks
Farley, John E., author
Prentice-Hall, 1987
Buku Teks