Cooper, D. R., & Schindler, P. S. (2008). Business Research Methods (10th ed.). McGraw-Hill.
Cita Chicago (17th ed.)Cooper, Donald R., i Pamela S. Schindler. Business Research Methods. 10th ed. Boston: McGraw-Hill, 2008.
Cita MLA (8th ed.)Cooper, Donald R., i Pamela S. Schindler. Business Research Methods. 10th ed. McGraw-Hill, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.