Παραπομπή APA

Sheldon, C. (1997). ISO 14001 and beyond: Environmental mangement systems in the real world. Sheffield: Greenleaf publishing.

Παραπομπή Chicago Style

Sheldon, Christopher. ISO 14001 and Beyond: Environmental Mangement Systems in the Real World. Sheffield: Greenleaf publishing, 1997.

Παραπομπή MLA

Sheldon, Christopher. ISO 14001 and Beyond: Environmental Mangement Systems in the Real World. Sheffield: Greenleaf publishing, 1997.

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