COOPER, D. R., & EMORY, C. W. (1995). Business research methods.-- ed.5. Irwin.
Chicago-čujuhus (17. p.)COOPER, Donald R., juo C. William EMORY. Business Research Methods.-- Ed.5. Chicago: Irwin, 1995.
MLA-čujuhus (9. p.)COOPER, Donald R., juo C. William EMORY. Business Research Methods.-- Ed.5. Irwin, 1995.
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