ProQuest (Firm). (1931). Annual Reports of the public utility companies of the District of Columbia for the year ended December 31, 1930. [publisher not identified].
Chicago Style (17th ed.) CitationProQuest (Firm). Annual Reports of the Public Utility Companies of the District of Columbia for the Year Ended December 31, 1930. Washington: [publisher not identified], 1931.
MLA (9th ed.) CitationProQuest (Firm). Annual Reports of the Public Utility Companies of the District of Columbia for the Year Ended December 31, 1930. [publisher not identified], 1931.
Warning: These citations may not always be 100% accurate.