Asfahl, C. Ray, author
John Wiley & Sons, 1992
Buku Teks
Simons, Geoffrey L.
England: The National Computing Centre, 1980
Buku Teks
Morgan, Chris
Berlin: Springer-Verlag, 1984
Buku Teks
Lammineur, P.
Pergamon Press, 1984
Buku Teks
Groover, Mikell P., author
Prentice-Hall, 1987
Buku Teks