دريد خالد علي. “Educational Principles in the Biography of Prince of Muslims Omar Bin Al-Khatab (May Allah Bless Him)”. College of Basic Education Research Journal 2, no. 3 (September 1, 2006): 1–15. Accessed October 26, 2025. https://stats.uomosul.edu.iq/index.php/berj/article/view/38967.