United States. Post Office Department. (1911). Regulations promulgated by authority of Board of Trustees, together with Act of Congress approved June 25, 1910. GPO.
Chicago Style (17th ed.) CitationUnited States. Post Office Department. Regulations Promulgated by Authority of Board of Trustees, Together with Act of Congress Approved June 25, 1910. [Washington]: GPO, 1911.
MLA (9th ed.) CitationUnited States. Post Office Department. Regulations Promulgated by Authority of Board of Trustees, Together with Act of Congress Approved June 25, 1910. GPO, 1911.
Warning: These citations may not always be 100% accurate.