Não informado. (1930). Advertising Age: International newspaper of marketing. Crain Communications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Advertising Age: International Newspaper of Marketing. Chicago, Ill: Crain Communications, 1930.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Advertising Age: International Newspaper of Marketing. Crain Communications, 1930.
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