Elshafei, A. (1969). A Multi-Channel Queuing Model A Simulation Approach. The Institute of National Planning.
Lua i Stíl Chicago (17ú heag.)Elshafei, Alwalid. A Multi-Channel Queuing Model A Simulation Approach. Cairo: The Institute of National Planning, 1969.
Lua MLA (9ú heag.)Elshafei, Alwalid. A Multi-Channel Queuing Model A Simulation Approach. The Institute of National Planning, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.