United States. Postmaster General. (1932). Return of undeliverable postal cards bearing return card and pledge. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Postmaster General. Return of Undeliverable Postal Cards Bearing Return Card and Pledge. Washington: U.S. GPO, 1932.
MLA (9th ed.) CitationUnited States. Postmaster General. Return of Undeliverable Postal Cards Bearing Return Card and Pledge. U.S. GPO, 1932.
Warning: These citations may not always be 100% accurate.