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Dyfyniad Arddull ChicagoDryden, Windy, and Robert Rentoul. Adult Clinical Problems: A Cognitive - Behavioural Approach. London, Routledge, 1991.
Dyfyniad MLADryden, Windy, and Robert Rentoul. Adult Clinical Problems: A Cognitive - Behavioural Approach. 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.