United States. Bureau of Labor Statistics & ProQuest (Firm). (1950). Directory of Labor Unions in the United States National and International Unions State Labor Organizations 1950. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Bureau of Labor Statistics and ProQuest (Firm). Directory of Labor Unions in the United States National and International Unions State Labor Organizations 1950. Washington: [publisher not identified], 1950.
MLA (9th ed.) CitationUnited States. Bureau of Labor Statistics and ProQuest (Firm). Directory of Labor Unions in the United States National and International Unions State Labor Organizations 1950. [publisher not identified], 1950.
Warning: These citations may not always be 100% accurate.