APA (7th ed.) Citation

United States. Patent Office. (1939). Patent Laws, 1939 Revisions. [s.n.].

Chicago Style (17th ed.) Citation

United States. Patent Office. Patent Laws, 1939 Revisions. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Patent Office. Patent Laws, 1939 Revisions. [s.n.], 1939.

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