United States. Department of Labor. (1940). Twenty-eighth annual report of the secretary of labor, for the fiscal year ended June 30, 1940. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Department of Labor. Twenty-eighth Annual Report of the Secretary of Labor, for the Fiscal Year Ended June 30, 1940. [Washington]: [publisher not identified], 1940.
MLA (9th ed.) CitationUnited States. Department of Labor. Twenty-eighth Annual Report of the Secretary of Labor, for the Fiscal Year Ended June 30, 1940. [publisher not identified], 1940.
Warning: These citations may not always be 100% accurate.