United States. Post Office Department. (1940). United States Official Postal Guide; Monthly Supplement to Parts I and II; November 1940. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Post Office Department. United States Official Postal Guide; Monthly Supplement to Parts I and II; November 1940. [Washington]: [publisher not identified], 1940.
MLA (9th ed.) CitationUnited States. Post Office Department. United States Official Postal Guide; Monthly Supplement to Parts I and II; November 1940. [publisher not identified], 1940.
Warning: These citations may not always be 100% accurate.