Sethi, Ravi
Addison-Wesley, 1989
Buku Teks
Sebesta, Robert W.
The Benjamin/Cumming Publishing Company.inc, 1989
Buku Teks
Pratt, Terrence W.
Prentice-Hall, 1975
Buku Teks
Tennent, R.D.
Prentice-Hall, 1981
Buku Teks
Ledgrad, Henry
Science Research Association, 1981
Buku Teks