Não informado. (1975). Sales and Marketing Management. Sales and Marketing Management.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Sales and Marketing Management. New York: Sales and Marketing Management, 1975.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Sales and Marketing Management. Sales and Marketing Management, 1975.
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