RASHEED, Z. . The Caliphate of Hazrat Umar ibn al-Khattab (R.A.): A Historical and Analytical Study. Al Khadim Research Journal of Islamic Culture and Civilization, [S. l.], v. 5, n. 4, p. 42–48, 2024. Disponível em: https://www.arjicc.com/index.php/arjicc/article/view/405. Acesso em: 13 sep. 2025.