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Dyfyniad Arddull ChicagoChristensen, Larry B. Experimental Methodology. 4th ed. Boston: Allyn and Bacon, 1988.
Dyfyniad MLAChristensen, Larry B. Experimental Methodology. 4th ed. Allyn and Bacon, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.