Elshafei, A. (1969). Process Control Series Equipment Specifications. The Institute of National Planning.
Cytowanie według stylu Chicago (wyd. 17)Elshafei, Alwalid. Process Control Series Equipment Specifications. Cairo: The Institute of National Planning, 1969.
Cytowanie według stylu MLA (wyd. 9)Elshafei, Alwalid. Process Control Series Equipment Specifications. The Institute of National Planning, 1969.