F. Mansour
(1)
, M. Abdulsadiq
(2)
, A. Khalfallh
(3)
(1)
Engineering Management Department, faculty of nature resources Engineering, Zawia University, Zawia, Libya,
(2)
Management Department, faculty of Economic and political Sciences, Sabratha University, Sabratha, Libya,
(3)
Economic Department, faculty of Economic and political Sciences, Sabratha University, Sabratha, Libya
