APA (7th ed.) Citation

United States. Postmaster General. (1929). General scheme of delivery distribution for use in post office at Baltimore, Md. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. General Scheme of Delivery Distribution for Use in Post Office at Baltimore, Md. Washington: U.S. GPO, 1929.

MLA (9th ed.) Citation

United States. Postmaster General. General Scheme of Delivery Distribution for Use in Post Office at Baltimore, Md. U.S. GPO, 1929.

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