R.Cooper, D., & Schindler, P. S. (2006). Marketing research. McGraw Hill.
Chicago Style aipamenaR.Cooper, Donald, and Pamela S. Schindler. Marketing Research. McGraw Hill, 2006.
MLA aipamenaR.Cooper, Donald, and Pamela S. Schindler. Marketing Research. McGraw Hill, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.