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Dyfyniad Arddull ChicagoWalker, James Edwin, and Thomas M. Shea. Behavior Management: A Practical Approach for Educators. 6th ed. Englewood Cliffs, N.J: Merrill, 1995.
Dyfyniad MLAWalker, James Edwin, and Thomas M. Shea. Behavior Management: A Practical Approach for Educators. 6th ed. Merrill, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.