elshafei, a. (1969). an introduction to simulation. National Planning Institute.
Citazione stile Chigago Style (17a edizione)elshafei, alwalid. An Introduction to Simulation. cairo: National Planning Institute, 1969.
Citatione MLA (9a ed.)elshafei, alwalid. An Introduction to Simulation. National Planning Institute, 1969.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.