United States. Mine Safety and Health Administration. Metal and nonmetal national mine rescue contest rules. U.S. Dept. of Labor, Mine Safety and Health Administration.
Chicago Style (17th ed.) CitationUnited States. Mine Safety and Health Administration. Metal and Nonmetal National Mine Rescue Contest Rules. [Arlington, Va.]: U.S. Dept. of Labor, Mine Safety and Health Administration.
MLA (9th ed.) CitationUnited States. Mine Safety and Health Administration. Metal and Nonmetal National Mine Rescue Contest Rules. U.S. Dept. of Labor, Mine Safety and Health Administration.
Warning: These citations may not always be 100% accurate.