United States. Interstate Commerce Commission. Bureau of Motor Carriers. (1940). Statistics of Class I Motor Carriers, For the Year Ended Dec. 31, 1940. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Interstate Commerce Commission. Bureau of Motor Carriers. Statistics of Class I Motor Carriers, For the Year Ended Dec. 31, 1940. [Washington]: [publisher not identified], 1940.
MLA (9th ed.) CitationUnited States. Interstate Commerce Commission. Bureau of Motor Carriers. Statistics of Class I Motor Carriers, For the Year Ended Dec. 31, 1940. [publisher not identified], 1940.
Warning: These citations may not always be 100% accurate.