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Dyfyniad Arddull ChicagoPrice, Maribeth. Mastering ArcGIS. Boston: McGraw-Hill Companies,Incorporated, 2010.
Dyfyniad MLAPrice, Maribeth. Mastering ArcGIS. Boston: McGraw-Hill Companies,Incorporated, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.