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Dyfyniad Arddull ChicagoTrue, June Audrey. Finding Out Conducting and Evaluating Social Research. Califonia: Wadsworth, 1983.
Dyfyniad MLATrue, June Audrey. Finding Out Conducting and Evaluating Social Research. Wadsworth, 1983.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.