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Dyfyniad Arddull ChicagoSekaran Uma. Research Methods for Business. 4th. New Delhi: Wiley India, 2010.
Dyfyniad MLASekaran Uma. Research Methods for Business. 4th. Wiley India, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.