Sekaran Uma. Research Methods for Business (5th.). Wiley India.
Dyfyniad Arddull ChicagoSekaran Uma. Research Methods for Business. 5th. 2010: Wiley India.
Dyfyniad MLASekaran Uma. Research Methods for Business. 5th. Wiley India.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.