FERELL O C. (1993). MARKETING CONCEPTS AND STRATERGIES (8TH.). HOUGHTON & MIFFLIN.
Chicago Style aipamenaFERELL O C. MARKETING CONCEPTS AND STRATERGIES. 8TH. BOSTON: HOUGHTON & MIFFLIN, 1993.
MLA aipamenaFERELL O C. MARKETING CONCEPTS AND STRATERGIES. 8TH. HOUGHTON & MIFFLIN, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.