Cita APA (7th ed.)

Elshafei, A. (1969). General Purpose Systems Simulator (GPSS). The Institute of National Planning.

Cita Chicago (17th ed.)

Elshafei, Alwalid. General Purpose Systems Simulator (GPSS). Cairo: The Institute of National Planning, 1969.

Cita MLA (9th ed.)

Elshafei, Alwalid. General Purpose Systems Simulator (GPSS). The Institute of National Planning, 1969.

Atenció: Aquestes cites poden no estar 100% correctes.