SEKARAN UMA. (2010). RESEARCH METHODS FOR BUSINESS (4th.). WILEY INDIA.
Chicago Style aipamenaSEKARAN UMA. RESEARCH METHODS FOR BUSINESS. 4th. NOIDA: WILEY INDIA, 2010.
MLA aipamenaSEKARAN UMA. RESEARCH METHODS FOR BUSINESS. 4th. WILEY INDIA, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.