Gaya APA

Cooper, D, R., Schindler, P, S. (2014). BUSINESS RESEARCH METHODS (12th). New York: MCGRAW-HILL.

Gaya MLA

Cooper, Donald, R.., Schindler, Pamela, S.. "BUSINESS RESEARCH METHODS". 12th New York: MCGRAW-HILL, 2014. Text.