APA (7th ed.) Citation

U. S. Bureau of Labor Statistics. (1943). Directory of national and international labor unions in the United States. 1943-. Govt. Print. Off.

Chicago Style (17th ed.) Citation

U. S. Bureau of Labor Statistics. Directory of National and International Labor Unions in the United States. 1943-. Washington: Govt. Print. Off, 1943.

MLA (9th ed.) Citation

U. S. Bureau of Labor Statistics. Directory of National and International Labor Unions in the United States. 1943-. Govt. Print. Off, 1943.