United States. Occupational Safety and Health Administration. (2011). Tree trimming safety. U.S. Dept. of Labor, Occupational Safety and Health Administration.
Chicago Style (17th ed.) CitationUnited States. Occupational Safety and Health Administration. Tree Trimming Safety. [Washington, D.C.]: U.S. Dept. of Labor, Occupational Safety and Health Administration, 2011.
MLA (9th ed.) CitationUnited States. Occupational Safety and Health Administration. Tree Trimming Safety. U.S. Dept. of Labor, Occupational Safety and Health Administration, 2011.
Warning: These citations may not always be 100% accurate.