Não informado. (2017). Advertising Age's Business Marketing. Crain Communications.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Advertising Age's Business Marketing. Chicago, Ill: Crain Communications, 2017.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Advertising Age's Business Marketing. Crain Communications, 2017.
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