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Dyfyniad Arddull ChicagoLeary, Mark R. Introduction to Behavioral Research Methods. 3rd ed. Boston: Allyn and Bacon, 2001.
Dyfyniad MLALeary, Mark R. Introduction to Behavioral Research Methods. 3rd ed. Allyn and Bacon, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.