APA (7th ed.) Citation

United States. Bureau of Standards. (1920). Sulphur in petroleum oils. GPO.

Chicago Style (17th ed.) Citation

United States. Bureau of Standards. Sulphur in Petroleum Oils. [Washington]: GPO, 1920.

MLA (9th ed.) Citation

United States. Bureau of Standards. Sulphur in Petroleum Oils. GPO, 1920.

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