APA (7th ed.) Citation

United States. Patent Office. (1931). Plant pat. [United States Patent Office].

Chicago Style (17th ed.) Citation

United States. Patent Office. Plant Pat. [Washington, D.C.]: [United States Patent Office], 1931.

MLA (9th ed.) Citation

United States. Patent Office. Plant Pat. [United States Patent Office], 1931.

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