Welford, R. (1999). Corporate environmental management (2nd ed.). London: Earthscan Publications Ltd.
Παραπομπή Chicago StyleWelford, Richard. Corporate Environmental Management. 2nd ed. London: Earthscan Publications Ltd, 1999.
Παραπομπή MLAWelford, Richard. Corporate Environmental Management. 2nd ed. London: Earthscan Publications Ltd, 1999.
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