R. Cooper, D., S. Schindler, P., & Sharma, . J. K. (2012). Business Research Methods. Mc Graw Hill.
Cita Chicago (17th ed.)R. Cooper, Donald, Pamela S. Schindler, i J. K. Sharma. Business Research Methods. New Delhi: Mc Graw Hill, 2012.
Cita MLA (9th ed.)R. Cooper, Donald, et al. Business Research Methods. Mc Graw Hill, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.