APA (7th ed.) Citation

District of Columbia. Board of Commissioners. (1930). Elevator regulations of D.C.; elevators, escalators, and dumb-waiters. U.S. GPO.

Chicago Style (17th ed.) Citation

District of Columbia. Board of Commissioners. Elevator Regulations of D.C.; Elevators, Escalators, and Dumb-waiters. Washington: U.S. GPO, 1930.

MLA (9th ed.) Citation

District of Columbia. Board of Commissioners. Elevator Regulations of D.C.; Elevators, Escalators, and Dumb-waiters. U.S. GPO, 1930.