World Intellectual Property Organization (Geneva, Switzerland). (2006). International classification of goods and services for the purposes of the registration of marks: Nice classification (9th ed.). WIPO.
Chicago-Zitierstil (17. Ausg.)World Intellectual Property Organization (Geneva, Switzerland). International Classification of Goods and Services for the Purposes of the Registration of Marks: Nice Classification. 9th ed. Geneva: WIPO, 2006.
MLA-Zitierstil (9. Ausg.)World Intellectual Property Organization (Geneva, Switzerland). International Classification of Goods and Services for the Purposes of the Registration of Marks: Nice Classification. 9th ed. WIPO, 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.