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Dyfyniad Arddull ChicagoFanning/Howey Associates. Shaping the Future: Middle Schools. Celina, Ohio: The Associates, 1998.
Dyfyniad MLAFanning/Howey Associates. Shaping the Future: Middle Schools. The Associates, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.