APA-čujuhus (7. p.)

Cooper, D. (2006). BUSINESS RESEARCH METHODS (9th.). McGraw Hill.

Chicago-čujuhus (17. p.)

Cooper, Donald. BUSINESS RESEARCH METHODS. 9th. New Delhi: McGraw Hill, 2006.

MLA-čujuhus (9. p.)

Cooper, Donald. BUSINESS RESEARCH METHODS. 9th. McGraw Hill, 2006.

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