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Dyfyniad Arddull ChicagoLeary, Mark R. Introduction to Behavioral Research Methods. 2nd.ed. Pacific Grove: Brokes/Cole, 1995.
Dyfyniad MLALeary, Mark R. Introduction to Behavioral Research Methods. 2nd.ed. Brokes/Cole, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.