APA (7th ed.) Citation

United States. Postmaster General. (1921). Scheme of city distribution, Little Rock, Ark. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Scheme of City Distribution, Little Rock, Ark. Washington: U.S. GPO, 1921.

MLA (9th ed.) Citation

United States. Postmaster General. Scheme of City Distribution, Little Rock, Ark. U.S. GPO, 1921.

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