United States. Post Office Department. (1928). Official opinions of Solicitor of Post Office Department, formerly Assistant Attorney General for Post Office Department: Volume VI, July 29, 1914 to June 29, 1920. GPO.
Chicago Style (17th ed.) CitationUnited States. Post Office Department. Official Opinions of Solicitor of Post Office Department, Formerly Assistant Attorney General for Post Office Department: Volume VI, July 29, 1914 to June 29, 1920. [Washington]: GPO, 1928.
MLA (9th ed.) CitationUnited States. Post Office Department. Official Opinions of Solicitor of Post Office Department, Formerly Assistant Attorney General for Post Office Department: Volume VI, July 29, 1914 to June 29, 1920. GPO, 1928.
Warning: These citations may not always be 100% accurate.