SEKARAN UMA. (2006). RESEARCH METHODS FOR BUSINESS: A SKILL-BUILDING APPROACH (4TH.). WILEY INDIA.
Chicago-viite (17. p.)SEKARAN UMA. RESEARCH METHODS FOR BUSINESS: A SKILL-BUILDING APPROACH. 4TH. NEW DELHI: WILEY INDIA, 2006.
MLA-viite (9. p.)SEKARAN UMA. RESEARCH METHODS FOR BUSINESS: A SKILL-BUILDING APPROACH. 4TH. WILEY INDIA, 2006.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.