(1997). Towards sustainability: The European Commission's progress report and action plan on the fifth programme of policy and action in relation to the environment and sustainable development. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleTowards Sustainability: The European Commission's Progress Report and Action Plan On the Fifth Programme of Policy and Action in Relation to the Environment and Sustainable Development. Luxembourg: Office for Official Publications of the European Communities, 1997.
Παραπομπή MLATowards Sustainability: The European Commission's Progress Report and Action Plan On the Fifth Programme of Policy and Action in Relation to the Environment and Sustainable Development. Luxembourg: Office for Official Publications of the European Communities, 1997.