APA (7th ed.) Citation

United States. Employment and Training Administration. (1987). Dictionary of occupational titles: Fourth edition supplement, 1986. U.S. Dept. of Labor, Employment and Training Administration.

Chicago Style (17th ed.) Citation

United States. Employment and Training Administration. Dictionary of Occupational Titles: Fourth Edition Supplement, 1986. [Washington, D.C.?]: U.S. Dept. of Labor, Employment and Training Administration, 1987.

MLA (9th ed.) Citation

United States. Employment and Training Administration. Dictionary of Occupational Titles: Fourth Edition Supplement, 1986. U.S. Dept. of Labor, Employment and Training Administration, 1987.