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Dyfyniad Arddull ChicagoRice, Melanie, Chris Barker, and Betty Root. Play Together, Learn Together. London: Kingfisher, 1985.
Dyfyniad MLARice, Melanie, et al. Play Together, Learn Together. Kingfisher, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.