Al- Gunaid, Ahmed M. Fadhel, trans. “Effect of Community Contracting on Decreasing Construction Cost”. Thamar University Journal of Natural & Applied Sciences 7, no. 1 (January 28, 2023): 67–79. Accessed April 20, 2026. https://journal.tu.edu.ye/index.php/TUJNAS/article/view/1344.