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Dyfyniad Arddull ChicagoHall, Lavinia. Negotiation: Strategies for Mutual Gain. London: Sage, 1993.
Dyfyniad MLAHall, Lavinia. Negotiation: Strategies for Mutual Gain. Sage, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.