APA (7th ed.) Citation

United States. Department of Commerce. (1921). Metal-mine accidents in U.S. during calendar year 1921. GPO.

Chicago Style (17th ed.) Citation

United States. Department of Commerce. Metal-mine Accidents in U.S. During Calendar Year 1921. [Washington]: GPO, 1921.

MLA (9th ed.) Citation

United States. Department of Commerce. Metal-mine Accidents in U.S. During Calendar Year 1921. GPO, 1921.

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