qayum, a. (1964). an extension of black's optimum savings model. the institute of national planning.
芝加哥风格引文qayum, a. An Extension of Black's Optimum Savings Model. cairo: the institute of national planning, 1964.
MLA引文qayum, a. An Extension of Black's Optimum Savings Model. the institute of national planning, 1964.
警告：这些引文格式不一定是100％准确.