El-Imam, M. M. (1968). The Demand - Income Function - A Study in Aggregation. The Institute of National Planning.
Cita Chicago (17th ed.)El-Imam, M. M. The Demand - Income Function - A Study in Aggregation. Cairo: The Institute of National Planning, 1968.
Cita MLA (9th ed.)El-Imam, M. M. The Demand - Income Function - A Study in Aggregation. The Institute of National Planning, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.