European Commission. (2012). Figures for the future: 20 years of sustainable development in Europe? Publications Office of the European Union.
Παραπομπή σε μορφή Chicago (17η εκδ.)European Commission. Figures for the Future: 20 Years of Sustainable Development in Europe? Luxemburg: Publications Office of the European Union, 2012.
Παραπομπή σε μορφή MLA (8th εκδ.)European Commission. Figures for the Future: 20 Years of Sustainable Development in Europe? Publications Office of the European Union, 2012.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.
