Παραπομπή σε μορφή APA (7η εκδ.)

Elshafei, W., & Mahdy, M. (1968). On Determining Reorder Point and Reorder Quantity in A Probabilistic Inventory Model. The Institute of National Planning.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Elshafei, W.A.M, και M.A.M Mahdy. On Determining Reorder Point and Reorder Quantity in A Probabilistic Inventory Model. Cairo: The Institute of National Planning, 1968.

Παραπομπή σε μορφή MLA (9th εκδ.)

Elshafei, W.A.M, και M.A.M Mahdy. On Determining Reorder Point and Reorder Quantity in A Probabilistic Inventory Model. The Institute of National Planning, 1968.