United States. Department of Commerce. Office of the Secretary. (1926). Proceedings of 4th National Radio Conference and recommendations for regulation of radio; conference called by Herbert Hoover, Secretary of Commerce, Washington, D.C., Nov.9-11, 1925. U.S. Government Printing Office.
Chicago Style (17th ed.) CitationUnited States. Department of Commerce. Office of the Secretary. Proceedings of 4th National Radio Conference and Recommendations for Regulation of Radio; Conference Called by Herbert Hoover, Secretary of Commerce, Washington, D.C., Nov.9-11, 1925. [Washington?]: U.S. Government Printing Office, 1926.
MLA (9th ed.) CitationUnited States. Department of Commerce. Office of the Secretary. Proceedings of 4th National Radio Conference and Recommendations for Regulation of Radio; Conference Called by Herbert Hoover, Secretary of Commerce, Washington, D.C., Nov.9-11, 1925. U.S. Government Printing Office, 1926.