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Dyfyniad Arddull ChicagoLIDZ, Carol Schneider. Improving Assessment of School Children. San Francisco: Jossey-Bass Pub, 1982.
Dyfyniad MLALIDZ, Carol Schneider. Improving Assessment of School Children. Jossey-Bass Pub, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.