APA (7th ed.) Citation

United States. Postmaster General. (1930). Defective postage stamps not to be sold. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Defective Postage Stamps Not to Be Sold. Washington: U.S. GPO, 1930.

MLA (9th ed.) Citation

United States. Postmaster General. Defective Postage Stamps Not to Be Sold. U.S. GPO, 1930.

Warning: These citations may not always be 100% accurate.