APA-čujuhus (7. p.)

Cooper, D. R. (2001). Business research methods. McGraw-Hill/Irwin.

Chicago-čujuhus (17. p.)

Cooper, Donald R. Business Research Methods. Boston: McGraw-Hill/Irwin, 2001.

MLA-čujuhus (9. p.)

Cooper, Donald R. Business Research Methods. McGraw-Hill/Irwin, 2001.

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