United States. Patent Office. (1901). Official gazette of U.S. Patent Office: Supplement to Vol. 97, containing classification of subjects of invention, revised and published between July 1 and Dec. 31, 1901. GPO.
Chicago Style (17th ed.) CitationUnited States. Patent Office. Official Gazette of U.S. Patent Office: Supplement to Vol. 97, Containing Classification of Subjects of Invention, Revised and Published Between July 1 and Dec. 31, 1901. [Washington]: GPO, 1901.
MLA (9th ed.) CitationUnited States. Patent Office. Official Gazette of U.S. Patent Office: Supplement to Vol. 97, Containing Classification of Subjects of Invention, Revised and Published Between July 1 and Dec. 31, 1901. GPO, 1901.
Warning: These citations may not always be 100% accurate.