Pritchard, J.A.T.
The National Computing Centre, 1985
Buku Teks
Bantin, Philip C., author
Neal-Schuman Publishers, Inc., 2008
Buku Teks
Hussain, K.M., author
Prentice-Hall, 1995
Buku Teks
McGraw-Hill, 2003
Buku Teks
Moss, Stephen R., author
Prentice-Hall, 2001
Buku Teks