APA (7th ed.) Citation

United States. Patent Office. (1881). Decisions of Commissioner of Patents for year 1881. GPO.

Chicago Style (17th ed.) Citation

United States. Patent Office. Decisions of Commissioner of Patents for Year 1881. [Washington]: GPO, 1881.

MLA (9th ed.) Citation

United States. Patent Office. Decisions of Commissioner of Patents for Year 1881. GPO, 1881.

Warning: These citations may not always be 100% accurate.