Attia, Hassan Namis, and Saad Mahmood Al-Kawaz. “The Experiences of the United States of America and China in the Knowledge Economy and Its Relationship to International Exchange”. Tikrit Journal of Administrative and Economic Sciences 17, no. 53, 2 (March 31, 2021): 293–311. Accessed March 6, 2026. https://www.tjaes.org/ojs/index.php/tjaes/article/view/1731.