APA Citation

(1981). Users guides to the international patent classification: (Industrial and technollogical information bank). Viyana: United Nations Industrial Development Organization.

Chicago Style Citation

Users Guides to the International Patent Classification: (Industrial and Technollogical Information Bank). Viyana: United Nations Industrial Development Organization, 1981.

MLA Citation

Users Guides to the International Patent Classification: (Industrial and Technollogical Information Bank). Viyana: United Nations Industrial Development Organization, 1981.

Warning: These citations may not always be 100% accurate.