El-Imam, M. M. (1968). The Demand - Income Function - A Study in Aggregation. The Institute of National Planning.
芝加哥风格引文El-Imam, M. M. The Demand - Income Function - A Study in Aggregation. Cairo: The Institute of National Planning, 1968.
MLA引文El-Imam, M. M. The Demand - Income Function - A Study in Aggregation. The Institute of National Planning, 1968.
警告：这些引文格式不一定是100％准确.