United States. Interstate Commerce Commission. (1928). Unit costs of railroad service, 1915-1927. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Interstate Commerce Commission. Unit Costs of Railroad Service, 1915-1927. Washington: [publisher not identified], 1928.
MLA (9th ed.) CitationUnited States. Interstate Commerce Commission. Unit Costs of Railroad Service, 1915-1927. [publisher not identified], 1928.
Warning: These citations may not always be 100% accurate.