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Dyfyniad Arddull ChicagoJang,Michael. RHCE: Red Hat Certified Engineer Linux. 4th ed. New Delhi: Dreamtech, 2005.
Dyfyniad MLAJang,Michael. RHCE: Red Hat Certified Engineer Linux. 4th ed. Dreamtech, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.