qayum, a. (1965). development of a dual economy. the institute of national planning.
芝加哥风格引文qayum, a. Development of a Dual Economy. cairo: the institute of national planning, 1965.
MLA引文qayum, a. Development of a Dual Economy. the institute of national planning, 1965.
警告：这些引文格式不一定是100％准确.