United States. Congress. House. Committee on Post Office and Post Roads & ProQuest (Firm). (1907). Letter from the Secretary of Commerce and Labor, submitting a record of mail matter entered at the Washington Post-Office by the Department under the penalty provision from July 1 to December 31, 1906. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Congress. House. Committee on Post Office and Post Roads and ProQuest (Firm). Letter from the Secretary of Commerce and Labor, Submitting a Record of Mail Matter Entered at the Washington Post-Office by the Department Under the Penalty Provision from July 1 to December 31, 1906. Washington: [publisher not identified], 1907.
MLA (9th ed.) CitationUnited States. Congress. House. Committee on Post Office and Post Roads and ProQuest (Firm). Letter from the Secretary of Commerce and Labor, Submitting a Record of Mail Matter Entered at the Washington Post-Office by the Department Under the Penalty Provision from July 1 to December 31, 1906. [publisher not identified], 1907.