(1968). United Nations. Economic and Social Council. Economic Commission for Europe: Twenty-third session: Study of the requirements in engineering products of the European countries in the process of industrialization. Paris: Economic Commission for Europe.
Čikaški stil citiranjaUnited Nations. Economic and Social Council. Economic Commission for Europe: Twenty-third Session: Study of the Requirements in Engineering Products of the European Countries in the Process of Industrialization. Paris: Economic Commission for Europe, 1968.
MLA način citiranjaUnited Nations. Economic and Social Council. Economic Commission for Europe: Twenty-third Session: Study of the Requirements in Engineering Products of the European Countries in the Process of Industrialization. Paris: Economic Commission for Europe, 1968.