(1997). International classification of the figurative elements of marks: Vienna classification (4th ed.). WIPO.
Chicago Style aipamenaInternational Classification of the Figurative Elements of Marks: Vienna Classification. 4th ed. Geneva: WIPO, 1997.
MLA aipamenaInternational Classification of the Figurative Elements of Marks: Vienna Classification. 4th ed. WIPO, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.