qayum, a. (1964). cumulative marginal productivity life of plants and the optimal technology. the institute of national planning.
芝加哥风格引文qayum, a. Cumulative Marginal Productivity Life of Plants and the Optimal Technology. cairo: the institute of national planning, 1964.
MLA引文qayum, a. Cumulative Marginal Productivity Life of Plants and the Optimal Technology. the institute of national planning, 1964.
警告：这些引文格式不一定是100％准确.