Não informado. (2004). Supply management. Chartered Institute of Purchasing and Supply.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Supply Management. London: Chartered Institute of Purchasing and Supply, 2004.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Supply Management. Chartered Institute of Purchasing and Supply, 2004.
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