Sekaran Uma. Research Methods for Business (4th.). Wiley India.
Cita Chicago (17th ed.)Sekaran Uma. Research Methods for Business. 4th. 2006: Wiley India.
Cita MLA (9th ed.)Sekaran Uma. Research Methods for Business. 4th. Wiley India.
Atenció: Aquestes cites poden no estar 100% correctes.