United States. Mine Safety and Health Administration. (2012). Supplemental roof support materials. [U.S. Department of Labor, Mine Safety and Health Administration].
Chicago Style (17th ed.) CitationUnited States. Mine Safety and Health Administration. Supplemental Roof Support Materials. [Arlington, Va.]: [U.S. Department of Labor, Mine Safety and Health Administration], 2012.
MLA (9th ed.) CitationUnited States. Mine Safety and Health Administration. Supplemental Roof Support Materials. [U.S. Department of Labor, Mine Safety and Health Administration], 2012.
Warning: These citations may not always be 100% accurate.