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Dyfyniad Arddull ChicagoOverby John. Labor-Management Relations 05/06. American: McGraw -Hill, 2006.
Dyfyniad MLAOverby John. Labor-Management Relations 05/06. American: McGraw -Hill, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.