United States. Federal Supply Service. (1928). General schedule of supplies for fiscal year 1929, revision of class 19: Electric service, for period Jan. 1 to June 30, 1929. GPO.
Chicago Style (17th ed.) CitationUnited States. Federal Supply Service. General Schedule of Supplies for Fiscal Year 1929, Revision of Class 19: Electric Service, for Period Jan. 1 to June 30, 1929. [Washington]: GPO, 1928.
MLA (9th ed.) CitationUnited States. Federal Supply Service. General Schedule of Supplies for Fiscal Year 1929, Revision of Class 19: Electric Service, for Period Jan. 1 to June 30, 1929. GPO, 1928.
Warning: These citations may not always be 100% accurate.