Cita APA (7th ed.)

elshafei, a. (1969). an introduction to simulation. National Planning Institute.

Cita Chicago (17th ed.)

elshafei, alwalid. An Introduction to Simulation. cairo: National Planning Institute, 1969.

Cita MLA (9th ed.)

elshafei, alwalid. An Introduction to Simulation. National Planning Institute, 1969.