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.
Chicago-referens (17:e uppl.)United Nations. Economic Commission for Europe och United Nations. Secretariat. Dept. of Social Affairs. Directory of Building Research and Development Organizations in Europe. Geneva: s.n, 1951.
MLA-referens (9:e uppl.)United Nations. Economic Commission for Europe och United Nations. Secretariat. Dept. of Social Affairs. Directory of Building Research and Development Organizations in Europe. s.n, 1951.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.