APA (7th ed.) Citation

Knovel (Firm) & United States. Occupational Safety and Health Administration. (2002). Excavations (2002 (rev.).). U.S. Dept. of Labor, Occupational Safety and Health Administration.

Chicago Style (17th ed.) Citation

Knovel (Firm) and United States. Occupational Safety and Health Administration. Excavations. 2002 (rev.). [Washington, D.C.?]: U.S. Dept. of Labor, Occupational Safety and Health Administration, 2002.

MLA (9th ed.) Citation

Knovel (Firm) and United States. Occupational Safety and Health Administration. Excavations. 2002 (rev.). U.S. Dept. of Labor, Occupational Safety and Health Administration, 2002.