Dictionary of occupational titles.
APA Citation
United States Employment Service., United States. Bureau of Manpower Utilization. (193944). Dictionary of occupational titles. Washington: U.S. Govt. Print. Off..
MLA Citation
United States Employment Service, and United States. Bureau of Manpower Utilization. Dictionary of Occupational Titles. Washington: U.S. Govt. Print. Off., 193944.
Warning: These citations may not always be complete (especially for serials).