Elshafei, A. (1969). Analysis of A Two-Channel Queuing Model: ( A Simulation Approach ). The Institute of National Planning.
Tohutoru Kātū Chicago (17th ed.)Elshafei, Alwalid. Analysis of A Two-Channel Queuing Model: ( A Simulation Approach ). Cairo: The Institute of National Planning, 1969.
Tohutoro MLA (9th ed.)Elshafei, Alwalid. Analysis of A Two-Channel Queuing Model: ( A Simulation Approach ). The Institute of National Planning, 1969.