URBAN, G. L. (1991). Advanced Marketing Strategy. Prentice - Hall.
Chicago Style aipamenaURBAN, Glen L. Advanced Marketing Strategy. Prentice - Hall, 1991.
MLA aipamenaURBAN, Glen L. Advanced Marketing Strategy. Prentice - Hall, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.