Bearden, W. O. O. (2007). Marketing: Principles & Pesspectives (5th.). McGraw-Hill Publ.
Chicago Style aipamenaBearden, William O.& Others. Marketing: Principles & Pesspectives. 5th. Boston: McGraw-Hill Publ, 2007.
MLA aipamenaBearden, William O.& Others. Marketing: Principles & Pesspectives. 5th. McGraw-Hill Publ, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.