APA (7th ed.) Citation

U.N. Economic Commission for Europe. (1973). Directory of building research and development organization in Europe. The Office.

Chicago Style (17th ed.) Citation

U.N. Economic Commission for Europe. Directory of Building Research and Development Organization in Europe. Geneva: The Office, 1973.

MLA (9th ed.) Citation

U.N. Economic Commission for Europe. Directory of Building Research and Development Organization in Europe. The Office, 1973.