United Nations. Economic Commission for Europe & United Nations. Secretariat. Dept. of Social Affairs. (1951). Directory of building research and development organizations in Europe. s.n.
Citazione stile Chigago Style (17a edizione)United Nations. Economic Commission for Europe e United Nations. Secretariat. Dept. of Social Affairs. Directory of Building Research and Development Organizations in Europe. Geneva: s.n, 1951.
Citatione MLA (9a ed.)United Nations. Economic Commission for Europe e United Nations. Secretariat. Dept. of Social Affairs. Directory of Building Research and Development Organizations in Europe. s.n, 1951.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.