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Dyfyniad Arddull ChicagoEgan, Gerard. Exercises in Helping Skills: A Training Manual to Accompany the Skilled Helper. 4th ed. Monterey: Brooks/Cole, 1990.
Dyfyniad MLAEgan, Gerard. Exercises in Helping Skills: A Training Manual to Accompany the Skilled Helper. 4th ed. Brooks/Cole, 1990.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.