United States. Postmaster General. (1928). C.O.D. tags not legibly completed. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Postmaster General. C.O.D. Tags Not Legibly Completed. Washington: U.S. GPO, 1928.
MLA (9th ed.) CitationUnited States. Postmaster General. C.O.D. Tags Not Legibly Completed. U.S. GPO, 1928.
Warning: These citations may not always be 100% accurate.