United States. Patent Office. (1931). Patent laws; edition of Sept. 1931. GPO.
Chicago Style (17th ed.) CitationUnited States. Patent Office. Patent Laws; Edition of Sept. 1931. [Washington]: GPO, 1931.
MLA (9th ed.) CitationUnited States. Patent Office. Patent Laws; Edition of Sept. 1931. GPO, 1931.
Warning: These citations may not always be 100% accurate.