COOPER D R & Schindler Pamela. (2019). BUSINESS RESEARCH METHODS (12th.). MCGRAW-HILL Education India.
Lua i Stíl Chicago (17ú heag.)COOPER D R agus Schindler Pamela. BUSINESS RESEARCH METHODS. 12th. Chennai: MCGRAW-HILL Education India, 2019.
Lua MLA (9ú heag.)COOPER D R agus Schindler Pamela. BUSINESS RESEARCH METHODS. 12th. MCGRAW-HILL Education India, 2019.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.