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Dyfyniad Arddull ChicagoImproving Library Services to People With Disabilities. Oxford: Chandos Publishing, 2007.
Dyfyniad MLAImproving Library Services to People With Disabilities. Oxford: Chandos Publishing, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.