APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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