APA (7th ed.) Citation

United States. Railway Mail Service. (1907). General scheme of State of Iowa, Feb. 1907. GPO.

Chicago Style (17th ed.) Citation

United States. Railway Mail Service. General Scheme of State of Iowa, Feb. 1907. [Washington]: GPO, 1907.

MLA (9th ed.) Citation

United States. Railway Mail Service. General Scheme of State of Iowa, Feb. 1907. GPO, 1907.

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