APA (7th ed.) Citation

United States. Congress. Joint Commission on Postal Service & ProQuest (Firm). (1921). Mail Facilities Required at Chicago, Ill, and Boston, Mass: Hearings before the United States Joint Commission on Postal Service, Sixty-Seventh Congress, first session, on Oct. 4, 5, 1921. U.S. G.P.O..

Chicago Style (17th ed.) Citation

United States. Congress. Joint Commission on Postal Service and ProQuest (Firm). Mail Facilities Required at Chicago, Ill, and Boston, Mass: Hearings Before the United States Joint Commission on Postal Service, Sixty-Seventh Congress, First Session, on Oct. 4, 5, 1921. Washington: U.S. G.P.O., 1921.

MLA (9th ed.) Citation

United States. Congress. Joint Commission on Postal Service and ProQuest (Firm). Mail Facilities Required at Chicago, Ill, and Boston, Mass: Hearings Before the United States Joint Commission on Postal Service, Sixty-Seventh Congress, First Session, on Oct. 4, 5, 1921. U.S. G.P.O., 1921.