Tohutoro APA (7th ed.)

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

Tohutoru Kātū Chicago (17th ed.)

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

Tohutoro MLA (9th ed.)

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