APA aipamena

COOPER, D. R. &. O. (2012). BUSINESS RESEARCH METHODS (4TH.).

Chicago Style aipamena

COOPER, DONALD R. & OTHERS. BUSINESS RESEARCH METHODS. 4TH. NEWDELHI, 2012.

MLA aipamena

COOPER, DONALD R. & OTHERS. BUSINESS RESEARCH METHODS. 4TH. 2012.