Elshafei, A. (1969). On The Machine Interference Problem. The Institute of National Planning.
芝加哥风格引文Elshafei, Alwalid. On The Machine Interference Problem. Cairo: The Institute of National Planning, 1969.
MLA引文Elshafei, Alwalid. On The Machine Interference Problem. The Institute of National Planning, 1969.
警告：这些引文格式不一定是100％准确.