APA (7th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. (1939). Simple soil washer for large samples. [s.n.].

Chicago Style (17th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. Simple Soil Washer for Large Samples. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Bureau of Entomology and Plant Quarantine. Simple Soil Washer for Large Samples. [s.n.], 1939.

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