APA (7th ed.) Citation

United States. Postmaster General. (1928). New size stamp coil now available in 1-cent denomination. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. New Size Stamp Coil Now Available in 1-cent Denomination. Washington: U.S. GPO, 1928.

MLA (9th ed.) Citation

United States. Postmaster General. New Size Stamp Coil Now Available in 1-cent Denomination. U.S. GPO, 1928.

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