Parsons, June
Cengage Learning, 2013
Buku Teks SO
Coulouris, George F.
Addison-Wesley, 1988
Buku Teks SO
Katzan, Harry, Jr.
Van Nostrand Remhald, 1973
Buku Teks SO
Lorin, Harold
John Wiley & Sons, 1980
Buku Teks SO
Shelly, Gary B.
Anaheim Publishing, 1984
Buku Teks SO