APA

United States, . (1919). Return of wire systems: hearings on H.R. 421, May 30-31, June 4-5, 1919. [Washington, D.C.]: .

Chicago

United States, . 1919. Return of wire systems: hearings on H.R. 421, May 30-31, June 4-5, 1919. [Washington, D.C.]: .

Harvard

United States, . (1919). Return of wire systems: hearings on H.R. 421, May 30-31, June 4-5, 1919. [Washington, D.C.]: .

MLA

United States, . Return of wire systems: hearings on H.R. 421, May 30-31, June 4-5, 1919. [Washington, D.C.]: . 1919.