APA (7th ed.) Citation

United States. Department of Commerce. (1921). Coal and coke mixtures as water-gas generator fuel. GPO.

Chicago Style (17th ed.) Citation

United States. Department of Commerce. Coal and Coke Mixtures as Water-gas Generator Fuel. [Washington]: GPO, 1921.

MLA (9th ed.) Citation

United States. Department of Commerce. Coal and Coke Mixtures as Water-gas Generator Fuel. GPO, 1921.