Cox, W. E. (1979). Industrial marketing research. John Wiley & Sons.
Chicago Style aipamenaCox, William E. Industrial Marketing Research. New York: John Wiley & Sons, 1979.
MLA aipamenaCox, William E. Industrial Marketing Research. John Wiley & Sons, 1979.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.