APA (7th ed.) Citation

Great Britain. Patent Office. (1869). Patents for inventions: Abridgements of specifications relating to writing instruments and materials. Office of the Commissioners of Patents for Inventions.

Chicago Style (17th ed.) Citation

Great Britain. Patent Office. Patents for Inventions: Abridgements of Specifications Relating to Writing Instruments and Materials. Lond.: Office of the Commissioners of Patents for Inventions, 1869.

MLA (8th ed.) Citation

Great Britain. Patent Office. Patents for Inventions: Abridgements of Specifications Relating to Writing Instruments and Materials. Office of the Commissioners of Patents for Inventions, 1869.