Daugherty, Dale
O'Reilly and Associates , 1991
Buku Teks SO
Muster, John
Microtech Publications, 1989
Buku Teks SO
Tare, Ramkrishna S.
McGraw-Hill, 1988
Buku Teks SO
Levine, John R.
O`Reilly, 1992
Buku Teks SO
Schreiner, Axel T.
Prentice-Hall, 1985
Buku Teks SO