Não informado. (1930). Advertising Age: International newspaper of marketing. Crain Communications.
Chicago-referens (17:e uppl.)Não informado. Advertising Age: International Newspaper of Marketing. Chicago, Ill: Crain Communications, 1930.
MLA-referens (8:e uppl.)Não informado. Advertising Age: International Newspaper of Marketing. Crain Communications, 1930.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.