Παραπομπή APA
European Commission. (1988). Principles and methods of the energy balance sheets. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleEuropean Commission. Principles and Methods of the Energy Balance Sheets. Luxembourg: Office for Official Publications of the European Communities, 1988.
Παραπομπή MLAEuropean Commission. Principles and Methods of the Energy Balance Sheets. Luxembourg: Office for Official Publications of the European Communities, 1988.
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