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Dyfyniad Arddull ChicagoL. Tubbs Stewart. A Systems Approach to Small Group Interaction. American: Mc Graw-Hill, 2005.
Dyfyniad MLAL. Tubbs Stewart. A Systems Approach to Small Group Interaction. American: Mc Graw-Hill, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.