APA (7th ed.) Citation

United States. Bureau of Plant Industry. (1938). Blue mold (downy mildew) disease of tobacco. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Plant Industry. Blue Mold (downy Mildew) Disease of Tobacco. [Washington]: [s.n.], 1938.

MLA (9th ed.) Citation

United States. Bureau of Plant Industry. Blue Mold (downy Mildew) Disease of Tobacco. [s.n.], 1938.