APA

United States, . (1966). The challenge to supervisors -- making young workers safe workers. [Washington, D.C.]: U.S. Department of Labor, Bureau of Labor Standards.

Chicago

United States, . 1966. The challenge to supervisors -- making young workers safe workers. [Washington, D.C.]: U.S. Department of Labor, Bureau of Labor Standards.

Harvard

United States, . (1966). The challenge to supervisors -- making young workers safe workers. [Washington, D.C.]: U.S. Department of Labor, Bureau of Labor Standards.

MLA

United States, . The challenge to supervisors -- making young workers safe workers. [Washington, D.C.]: U.S. Department of Labor, Bureau of Labor Standards. 1966.