APA استشهاد

Cooper, D. R. a. . S. (2014). Business research methods (11 Edition.).

استشهاد بنمط شيكاغو

Cooper, Donald R and Schindler. Business Research Methods. 11 Edition. Tata McGraw Hill Publishing Co. Ltd., New Delhi, 2014.

MLA استشهاد

Cooper, Donald R and Schindler. Business Research Methods. 11 Edition. 2014.