Ferrell, O. (2007). Marketing strategy (3rd ed.). Thomson.
Chicago Style aipamenaFerrell, O.C. Marketing Strategy. 3rd ed. Noida: Thomson, 2007.
MLA aipamenaFerrell, O.C. Marketing Strategy. 3rd ed. Thomson, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.