APA (7th ed.) Citation

United States. Postmaster General. (1925). New denomination -cent ordinary postage stamp. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. New Denomination -cent Ordinary Postage Stamp. Washington: U.S. GPO, 1925.

MLA (9th ed.) Citation

United States. Postmaster General. New Denomination -cent Ordinary Postage Stamp. U.S. GPO, 1925.

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