COOPER, D. R., & SCHINDLER, P. S. (2011). Business research methods. McGraw-Hill Book Company.
Lua i Stíl Chicago (17ú heag.)COOPER, Donald R., agus Pamela S. SCHINDLER. Business Research Methods. McGraw-Hill Book Company, 2011.
Lua MLA (9ú heag.)COOPER, Donald R., agus Pamela S. SCHINDLER. Business Research Methods. McGraw-Hill Book Company, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.