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