APA (7th ed.) Citation

United States. Division of Labor Standards. (1940). Machinists' apprenticeship standards, formulated by the Federal Welder and Machine Co., Warren, Ohio. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Division of Labor Standards. Machinists' Apprenticeship Standards, Formulated by the Federal Welder and Machine Co., Warren, Ohio. [Washington]: [publisher not identified], 1940.

MLA (9th ed.) Citation

United States. Division of Labor Standards. Machinists' Apprenticeship Standards, Formulated by the Federal Welder and Machine Co., Warren, Ohio. [publisher not identified], 1940.