APA (7th ed.) Citation

United States. Department of Commerce. (1920). Coal-mine fatalities in U.S., 1919, and coal-mine statistics supplementing those published in Bulletin 115; list of permissible explosives, lamps and motors tested prior to Jan. 31, 1920. GPO.

Chicago Style (17th ed.) Citation

United States. Department of Commerce. Coal-mine Fatalities in U.S., 1919, and Coal-mine Statistics Supplementing Those Published in Bulletin 115; List of Permissible Explosives, Lamps and Motors Tested Prior to Jan. 31, 1920. [Washington]: GPO, 1920.

MLA (9th ed.) Citation

United States. Department of Commerce. Coal-mine Fatalities in U.S., 1919, and Coal-mine Statistics Supplementing Those Published in Bulletin 115; List of Permissible Explosives, Lamps and Motors Tested Prior to Jan. 31, 1920. GPO, 1920.