United States. Congress. House. Committee on the District of Columbia & ProQuest (Firm). (1940). Regulating practice of professional engineering and creating board for licensure of professional engineers, District of Columbia. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Congress. House. Committee on the District of Columbia and ProQuest (Firm). Regulating Practice of Professional Engineering and Creating Board for Licensure of Professional Engineers, District of Columbia. Washington: [publisher not identified], 1940.
MLA (9th ed.) CitationUnited States. Congress. House. Committee on the District of Columbia and ProQuest (Firm). Regulating Practice of Professional Engineering and Creating Board for Licensure of Professional Engineers, District of Columbia. [publisher not identified], 1940.