National Automobile Chamber of Commerce. (1920). Facts and figures of the automobile industry. National Automobile Chamber of Commerce.
Chicago-referens (17:e uppl.)National Automobile Chamber of Commerce. Facts and Figures of the Automobile Industry. New York: National Automobile Chamber of Commerce, 1920.
MLA-referens (8:e uppl.)National Automobile Chamber of Commerce. Facts and Figures of the Automobile Industry. National Automobile Chamber of Commerce, 1920.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.