APA (7th ed.) Citation

United States. Interstate Commerce Commission. (1934). Operating Revenues and Operating Expenses of Class I Steam Railways in the United States, Apr. 1934. [s.n.].

Chicago Style (17th ed.) Citation

United States. Interstate Commerce Commission. Operating Revenues and Operating Expenses of Class I Steam Railways in the United States, Apr. 1934. [Washington]: [s.n.], 1934.

MLA (9th ed.) Citation

United States. Interstate Commerce Commission. Operating Revenues and Operating Expenses of Class I Steam Railways in the United States, Apr. 1934. [s.n.], 1934.