Παραπομπή σε μορφή APA (7η εκδ.)

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.

Παραπομπή σε μορφή Chicago (17η εκδ.)

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.

Παραπομπή σε μορφή MLA (8th εκδ.)

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.