Παραπομπή APA

European Commission., & Spangenberg, J. (1999). Material flow-based indicators in environmental reporting. Luxembourg: Office for Official Publications of the European Communities.

Παραπομπή Chicago Style

European Commission., and Joachim Spangenberg. Material Flow-based Indicators in Environmental Reporting. Luxembourg: Office for Official Publications of the European Communities, 1999.

Παραπομπή MLA

European Commission., and Joachim Spangenberg. Material Flow-based Indicators in Environmental Reporting. Luxembourg: Office for Official Publications of the European Communities, 1999.

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