United Nations. Economic Commission for Europe. (1951). Directory of building research and development organizations in Europe.
Citazione stile Chigago Style (17a edizione)United Nations. Economic Commission for Europe. Directory of Building Research and Development Organizations in Europe. Geneva, 1951.
Citatione MLA (8a ed.)United Nations. Economic Commission for Europe. Directory of Building Research and Development Organizations in Europe. 1951.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.