Doll, Dixon R.
John Wiley & Sons, 1978
Buku Teks
Martin, James
Prentice-Hall, 1970
Buku Teks SO
Sherman, Kenneth
Reston Publishing company, 1981
Buku Teks SO
Stallings, William
Prentice-Hall, 2004
Buku Teks SO
Forouzan, Behrouz A.
McGraw-Hill, 2002
Buku Teks SO