Não informado. (1930). Advertising Age: International newspaper of marketing. Crain Communications.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Advertising Age: International Newspaper of Marketing. Chicago, Ill: Crain Communications, 1930.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Advertising Age: International Newspaper of Marketing. Crain Communications, 1930.
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