APA (7th ed.) Citation

United States. Division of Labor Standards. (1939). Labor standards, Vol. 2, No. 9. [s.n.].

Chicago Style (17th ed.) Citation

United States. Division of Labor Standards. Labor Standards, Vol. 2, No. 9. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. Division of Labor Standards. Labor Standards, Vol. 2, No. 9. [s.n.], 1939.

Warning: These citations may not always be 100% accurate.