National Automobile Chamber of Commerce. (1920). Facts and figures of the automobile industry. National Automobile Chamber of Commerce.
Chicago-viite (17. p.)National Automobile Chamber of Commerce. Facts and Figures of the Automobile Industry. New York: National Automobile Chamber of Commerce, 1920.
MLA-viite (8. p.)National Automobile Chamber of Commerce. Facts and Figures of the Automobile Industry. National Automobile Chamber of Commerce, 1920.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.