Elshafei, A. (1969). General Purpose Systems Simulator (GPSS). The Institute of National Planning.
Chicago-Zitierstil (17. Ausg.)Elshafei, Alwalid. General Purpose Systems Simulator (GPSS). Cairo: The Institute of National Planning, 1969.
MLA-Zitierstil (9. Ausg.)Elshafei, Alwalid. General Purpose Systems Simulator (GPSS). The Institute of National Planning, 1969.