APA (7e ed.) Bronvermelding

COOPER, D. R., & EMORY, C. W. (1995). Business research methods.-- ed.5. Irwin.

Chicago (17e ed.) Bronvermelding

COOPER, Donald R., en C. William EMORY. Business Research Methods.-- Ed.5. Chicago: Irwin, 1995.

MLA (9e ed.) Bronvermelding

COOPER, Donald R., en C. William EMORY. Business Research Methods.-- Ed.5. Irwin, 1995.