elshafei, a. (1969). an introduction to simulation. National Planning Institute.
Chicago-čujuhus (17. p.)elshafei, alwalid. An Introduction to Simulation. cairo: National Planning Institute, 1969.
MLA-čujuhus (9. p.)elshafei, alwalid. An Introduction to Simulation. National Planning Institute, 1969.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.