Fadol, Hassan Tawakol A. “The Relationship Between the Gross Domestic Product, Foreign Direct Investment and Non-Oil Exports in the Saudi Economy (1970-2019)”. International Journal of Economic Development Research and Investment (IJEDRI) 11, no. 1 (April 1, 2020): 13–25. Accessed April 26, 2025. https://icidr.org.ng/index.php/Ijedri/article/view/942.