APA (7th ed.) Citation

United States. Postmaster General. (1932). Special cachet at Alexandria, Va., on May 12. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Special Cachet at Alexandria, Va., on May 12. Washington: U.S. GPO, 1932.

MLA (9th ed.) Citation

United States. Postmaster General. Special Cachet at Alexandria, Va., on May 12. U.S. GPO, 1932.

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