United States. Post Office Department. (1940). A Description of United States Postage Stamps, Historical and Commemorative Issues, From 1893 to 1939. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Post Office Department. A Description of United States Postage Stamps, Historical and Commemorative Issues, From 1893 to 1939. [Washington]: [publisher not identified], 1940.
MLA (9th ed.) CitationUnited States. Post Office Department. A Description of United States Postage Stamps, Historical and Commemorative Issues, From 1893 to 1939. [publisher not identified], 1940.
Warning: These citations may not always be 100% accurate.