United States. Post Office Department & ProQuest (Firm). (1939). Annual Report of the Postmaster General for the fiscal year ended June 30, 1939. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Post Office Department and ProQuest (Firm). Annual Report of the Postmaster General for the Fiscal Year Ended June 30, 1939. Washington: [publisher not identified], 1939.
MLA (9th ed.) CitationUnited States. Post Office Department and ProQuest (Firm). Annual Report of the Postmaster General for the Fiscal Year Ended June 30, 1939. [publisher not identified], 1939.
Warning: These citations may not always be 100% accurate.