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Dyfyniad Arddull ChicagoNash, Roy. Teacher Expectations and Pupil Learning. London ; Boston: Routledge & Paul, 1976.
Dyfyniad MLANash, Roy. Teacher Expectations and Pupil Learning. Routledge & Paul, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.