APA (7th ed.) Citation

United States. Postmaster General. (1929). Requests for changes in envelope orders. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Requests for Changes in Envelope Orders. Washington: U.S. GPO, 1929.

MLA (9th ed.) Citation

United States. Postmaster General. Requests for Changes in Envelope Orders. U.S. GPO, 1929.

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