United States. Patent Office. (1908). Classification of subjects of invention of U.S. Patent Office arranged by divisions with classes and subclasses in each; revised to July 1, 1908. U.S. Government Printing Office.
Chicago Style (17th ed.) CitationUnited States. Patent Office. Classification of Subjects of Invention of U.S. Patent Office Arranged by Divisions with Classes and Subclasses in Each; Revised to July 1, 1908. Washington, D.C.: U.S. Government Printing Office, 1908.
MLA (9th ed.) CitationUnited States. Patent Office. Classification of Subjects of Invention of U.S. Patent Office Arranged by Divisions with Classes and Subclasses in Each; Revised to July 1, 1908. U.S. Government Printing Office, 1908.
Warning: These citations may not always be 100% accurate.