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Dyfyniad Arddull ChicagoRudd, Colin. Problem Manager: Careers in IT Service Management. Swindon, [England]: BCS The Chartered Institute for IT, 2014.
Dyfyniad MLARudd, Colin. Problem Manager: Careers in IT Service Management. BCS The Chartered Institute for IT, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.