Al-Siddig Talha M. Rahma , Amir Mohammed Diab Ismail , Tawfig Eltayeb El Basher Abdelrahman , Dr. Durria Hyder Siddeg, “GCC Countries And Their Role In Activating Foreign Direct Investment The Kingdom Of Saudi Arabia As A Model (1985-2021) Imam Mohammed Ibn Saud Islamic University (IMSIU)”, Migrat. Lett., vol. 20, no. S5, pp. 1376–1396, Aug. 2023.