APA (7th ed.) Citation

United States Employment Service. (1938). Industrial classifications and codes for use in public employment offices. [s.n.].

Chicago Style (17th ed.) Citation

United States Employment Service. Industrial Classifications and Codes for Use in Public Employment Offices. [Washington]: [s.n.], 1938.

MLA (9th ed.) Citation

United States Employment Service. Industrial Classifications and Codes for Use in Public Employment Offices. [s.n.], 1938.