Sekaran Uma. Research Methods for Business (4th.). Wiley India.
Dyfyniad Arddull ChicagoSekaran Uma. Research Methods for Business. 4th. 2006: Wiley India.
Dyfyniad MLASekaran Uma. Research Methods for Business. 4th. Wiley India.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.