APA (7th ed.) Citation

United States. Bureau of Agricultural Engineering. (1934). Barrel seed scarifier. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Agricultural Engineering. Barrel Seed Scarifier. [Washington]: [s.n.], 1934.

MLA (9th ed.) Citation

United States. Bureau of Agricultural Engineering. Barrel Seed Scarifier. [s.n.], 1934.

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