United States. Congress. Senate. Committee on Public Buildings and Grounds & ProQuest (Firm). (1912). Underground Pneumatic Tube System: Hearings before the United States Senate Committee on Public Buildings and Grounds, Sixty-Second Congress, second session, on June 7, 1912. U.S. G.P.O..
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on Public Buildings and Grounds and ProQuest (Firm). Underground Pneumatic Tube System: Hearings Before the United States Senate Committee on Public Buildings and Grounds, Sixty-Second Congress, Second Session, on June 7, 1912. Washington: U.S. G.P.O., 1912.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on Public Buildings and Grounds and ProQuest (Firm). Underground Pneumatic Tube System: Hearings Before the United States Senate Committee on Public Buildings and Grounds, Sixty-Second Congress, Second Session, on June 7, 1912. U.S. G.P.O., 1912.