Dictionary of occupational titles.
APA Citation
United States. Bureau of Manpower Utilization., United States Employment Service. Dictionary of occupational titles. Washington: U.S. Govt. Print. Off.
MLA Citation
United States. Bureau of Manpower Utilization, and United States Employment Service. Dictionary of Occupational Titles. Washington: U.S. Govt. Print. Off,
Warning: These citations may not always be complete (especially for serials).