APA (7th ed.) Citation

United States. Bureau of Plant Industry. (1938). Genetic relations of some color factors in lettuce. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Plant Industry. Genetic Relations of Some Color Factors in Lettuce. [Washington]: [s.n.], 1938.

MLA (9th ed.) Citation

United States. Bureau of Plant Industry. Genetic Relations of Some Color Factors in Lettuce. [s.n.], 1938.

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