COOPER, D. R. (2003). Business research methods(ada CD). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)COOPER, Donald R. Business Research Methods(ada CD). McGraw-Hill, 2003.
Lua MLA (8ú heag.)COOPER, Donald R. Business Research Methods(ada CD). McGraw-Hill, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.