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Dyfyniad Arddull ChicagoSchach, Stephen R. Classical and Object-oriented Software Engineering with UML and Java. 4th ed. Boston: WCB/McGraw-Hill, 1999.
Dyfyniad MLASchach, Stephen R. Classical and Object-oriented Software Engineering with UML and Java. 4th ed. WCB/McGraw-Hill, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.