hansen, b. (1962). output- productivity and value added- productivity. the institute of national planning.
芝加哥风格引文hansen, bent. Output- Productivity and Value Added- Productivity. cairo: the institute of national planning, 1962.
MLA引文hansen, bent. Output- Productivity and Value Added- Productivity. the institute of national planning, 1962.
警告：这些引文格式不一定是100％准确.