Cita APA (7th ed.)

Elshafei, A. (1969). On The Machine Interference Problem. The Institute of National Planning.

Cita Chicago (17th ed.)

Elshafei, Alwalid. On The Machine Interference Problem. Cairo: The Institute of National Planning, 1969.

Cita MLA (9th ed.)

Elshafei, Alwalid. On The Machine Interference Problem. The Institute of National Planning, 1969.

Atenció: Aquestes cites poden no estar 100% correctes.