Simons, Geoffrey L.
England: The National Computing Centre, 1980
Buku Teks
Morgan, Chris
Berlin: Springer-Verlag, 1984
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Asfahl, C. Ray, author
John Wiley & Sons, 1992
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Lammineur, P.
Pergamon Press, 1984
Buku Teks
Marco Ceccarelli, editor
IGI Global, 2012
Buku Teks