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Dyfyniad Arddull ChicagoEggen, Paul D. Strategies for Teachers: Teaching Content and Thinking Skills. 2nd.ed. Englewood Cliffs: Prentice-Hall, 1988.
Dyfyniad MLAEggen, Paul D. Strategies for Teachers: Teaching Content and Thinking Skills. 2nd.ed. Prentice-Hall, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.