HARTLEY, R. F. (1995). Marketing Mistakes. John Wiley & Sons.
Chicago Style aipamenaHARTLEY, Robert F. Marketing Mistakes. John Wiley & Sons, 1995.
MLA aipamenaHARTLEY, Robert F. Marketing Mistakes. John Wiley & Sons, 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.