Παραπομπή APA

Center for Energy and Environmental Management., Hart, J., & Mckiel, M. (1999). ISO 14000 questions & answers. Fairfax: CEEM.

Παραπομπή Chicago Style

Center for Energy and Environmental Management., Jason Hart, and Mary Mckiel. ISO 14000 Questions & Answers. Fairfax: CEEM, 1999.

Παραπομπή MLA

Center for Energy and Environmental Management., Jason Hart, and Mary Mckiel. ISO 14000 Questions & Answers. Fairfax: CEEM, 1999.

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