Whitelaw, K. (1997). ISO 14001 environmental systems handbook. Butterworth Heinemann.
Tohutoru Kātū Chicago (17th ed.)Whitelaw, Ken. ISO 14001 Environmental Systems Handbook. Oxford; Boston: Butterworth Heinemann, 1997.
Tohutoro MLA (9th ed.)Whitelaw, Ken. ISO 14001 Environmental Systems Handbook. Butterworth Heinemann, 1997.
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