APA (7th ed.) Citation

U.S. Department of Labor, E. a. T. A. (1991). Dictionary of occupational titles (4th ed.). Bernan Press.

Chicago Style (17th ed.) Citation

U.S. Department of Labor, Employment and Training Administration. Dictionary of Occupational Titles. 4th ed. Lanhan, Md: Bernan Press, 1991.

MLA (9th ed.) Citation

U.S. Department of Labor, Employment and Training Administration. Dictionary of Occupational Titles. 4th ed. Bernan Press, 1991.