APA استشهاد

(1997). International classification of the figurative elements of marks: Vienna classification (4th ed.). WIPO.

استشهاد بنمط شيكاغو

International Classification of the Figurative Elements of Marks: Vienna Classification. 4th ed. Geneva: WIPO, 1997.

MLA استشهاد

International Classification of the Figurative Elements of Marks: Vienna Classification. 4th ed. WIPO, 1997.