elshafei, a. (1969). an introduction to simulation. National Planning Institute.
芝加哥风格引文elshafei, alwalid. An Introduction to Simulation. cairo: National Planning Institute, 1969.
MLA引文elshafei, alwalid. An Introduction to Simulation. National Planning Institute, 1969.
警告：这些引文格式不一定是100％准确.