Voorhees, J., & Woellner , R. A. (1998). International environmental risk management ISO 14000: And the systems approach. Lewis.
Chicago Style (17. basım) AtıfVoorhees, John, ve Robert A. Woellner. International Environmental Risk Management ISO 14000: And the Systems Approach. Boca Raton: Lewis, 1998.
MLA (9th ed.) AtıfVoorhees, John, ve Robert A. Woellner. International Environmental Risk Management ISO 14000: And the Systems Approach. Lewis, 1998.
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