Economic Commission for Europe. (1969). Principal factors affecting labour productivity trends in the iron and steel industry. United Nations.
Цитирование в стиле Чикаго (17-е изд.)Economic Commission for Europe. Principal Factors Affecting Labour Productivity Trends in the Iron and Steel Industry. New York: United Nations, 1969.
Цитирование MLA (8-е изд.)Economic Commission for Europe. Principal Factors Affecting Labour Productivity Trends in the Iron and Steel Industry. United Nations, 1969.
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