Não informado. (1971). Official Gazette of the United States Patent and Trademark Office. U.S. Department of Commerce.
Čikaški stil citiranja (17. izdanje)Não informado. Official Gazette of the United States Patent and Trademark Office. Washington: U.S. Department of Commerce, 1971.
MLA način citiranja (8. izdanje)Não informado. Official Gazette of the United States Patent and Trademark Office. U.S. Department of Commerce, 1971.
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