APA (7th ed.) Citation

United States. Patent Office. (1938). The official gazette of the United States Patent Office, [title page, contents, errata, etc., to] v. 480; Apr. 1938. [s.n.].

Chicago Style (17th ed.) Citation

United States. Patent Office. The Official Gazette of the United States Patent Office, [title Page, Contents, Errata, Etc., to] V. 480; Apr. 1938. [Washington]: [s.n.], 1938.

MLA (9th ed.) Citation

United States. Patent Office. The Official Gazette of the United States Patent Office, [title Page, Contents, Errata, Etc., to] V. 480; Apr. 1938. [s.n.], 1938.