United States. Mine Safety and Health Administration. (2012). Procedure for permitting the use of belt air to ventilate working sections of underground coal mines. [U.S. Department of Labor, Mine Safety and Health Administration].
Chicago Style (17th ed.) CitationUnited States. Mine Safety and Health Administration. Procedure for Permitting the Use of Belt Air to Ventilate Working Sections of Underground Coal Mines. [Arlington, Va.]: [U.S. Department of Labor, Mine Safety and Health Administration], 2012.
MLA (9th ed.) CitationUnited States. Mine Safety and Health Administration. Procedure for Permitting the Use of Belt Air to Ventilate Working Sections of Underground Coal Mines. [U.S. Department of Labor, Mine Safety and Health Administration], 2012.
Warning: These citations may not always be 100% accurate.