Sekaran Uma. Research Methods for Business (5th.). Wiley India.
Lua i Stíl Chicago (17ú heag.)Sekaran Uma. Research Methods for Business. 5th. 2010: Wiley India.
Lua MLA (9ú heag.)Sekaran Uma. Research Methods for Business. 5th. Wiley India.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.