APA (7th ed.) Citation

United States. Post Office Department. (1911). Scheme of separation to stations for use in post office at Pittsburgh, Pa. GPO.

Chicago Style (17th ed.) Citation

United States. Post Office Department. Scheme of Separation to Stations for Use in Post Office at Pittsburgh, Pa. [Washington]: GPO, 1911.

MLA (9th ed.) Citation

United States. Post Office Department. Scheme of Separation to Stations for Use in Post Office at Pittsburgh, Pa. GPO, 1911.