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Dyfyniad Arddull ChicagoT. Wohlers Terry. Applying AutoCAD 2006, Student Edition. American: Mc Graw-Hill, 2006.
Dyfyniad MLAT. Wohlers Terry. Applying AutoCAD 2006, Student Edition. American: Mc Graw-Hill, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.