Elshafei, A. (1969). Process Control Series: Economics of Process Control. The Institute of National Planning.
Chicago-referens (17:e uppl.)Elshafei, Alwalid. Process Control Series: Economics of Process Control. Cairo: The Institute of National Planning, 1969.
MLA-referens (9:e uppl.)Elshafei, Alwalid. Process Control Series: Economics of Process Control. The Institute of National Planning, 1969.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.