elshafei, a. (1969). an introduction to simulation. National Planning Institute.
Čikaški stil citiranja (17. izdanje)elshafei, alwalid. An Introduction to Simulation. cairo: National Planning Institute, 1969.
MLA način citiranja (9. izdanje)elshafei, alwalid. An Introduction to Simulation. National Planning Institute, 1969.
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