APA (7th ed.) Citation

United States. Postmaster General. (1923). Preparation of correspondence for signature of Postmaster General. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Preparation of Correspondence for Signature of Postmaster General. Washington: U.S. GPO, 1923.

MLA (9th ed.) Citation

United States. Postmaster General. Preparation of Correspondence for Signature of Postmaster General. U.S. GPO, 1923.

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