APA (7th ed.) Citation

United States. National Bureau of Standards. (1940). Ground and polished lenses for sun glasses. United States Department of Commerce, National Bureau of Standards.

Chicago Style (17th ed.) Citation

United States. National Bureau of Standards. Ground and Polished Lenses for Sun Glasses. Washington, D.C.: United States Department of Commerce, National Bureau of Standards, 1940.

MLA (9th ed.) Citation

United States. National Bureau of Standards. Ground and Polished Lenses for Sun Glasses. United States Department of Commerce, National Bureau of Standards, 1940.

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