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Dyfyniad Arddull ChicagoFussler H H. Information System Analysis: Theory and Applications. Chicago: Science Research, 1974.
Dyfyniad MLAFussler H H. Information System Analysis: Theory and Applications. Science Research, 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.