APA (7th ed.) Citation

United States. Postmaster General. (1920). Scheme of city distribution for use in post office at Louisville, Ky. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Scheme of City Distribution for Use in Post Office at Louisville, Ky. Washington: U.S. GPO, 1920.

MLA (9th ed.) Citation

United States. Postmaster General. Scheme of City Distribution for Use in Post Office at Louisville, Ky. U.S. GPO, 1920.

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