Welford, R. (1996). Corporate environmental management: Systems and strategies. Earthscan ; Universities Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWelford, Richard. Corporate Environmental Management: Systems and Strategies. London : New Delhi: Earthscan ; Universities Press, 1996.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWelford, Richard. Corporate Environmental Management: Systems and Strategies. Earthscan ; Universities Press, 1996.
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