“The Impact of Strarategic Planning in Achieving Cometitive Advantge: A Field Study on Yemeni Private Cement Manufacturing Companies in the Republic of Yemen”. Sana’a University Journal of Human Sciences 3, no. 3 (July 30, 2024): 383–421. Accessed May 4, 2026. https://journals.su.edu.ye/index.php/jhs/article/view/1043.