United States. Postmaster General. (1910). Summary of Department's reply to Periodical Publishers Association of America regarding 2nd-class mail. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Postmaster General. Summary of Department's Reply to Periodical Publishers Association of America Regarding 2nd-class Mail. Washington: U.S. GPO, 1910.
MLA (9th ed.) CitationUnited States. Postmaster General. Summary of Department's Reply to Periodical Publishers Association of America Regarding 2nd-class Mail. U.S. GPO, 1910.
Warning: These citations may not always be 100% accurate.