Ferber, R. (1974). Handbook of marketing research. McGraw-Hill.
Chicago Style aipamenaFerber, Robert. Handbook of Marketing Research. New Delhi: McGraw-Hill, 1974.
MLA aipamenaFerber, Robert. Handbook of Marketing Research. McGraw-Hill, 1974.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.