RUTEGIBIGENI , D.; MUTEI, J.; EFFUNGANI , S. M. The Impact of the Leadership Style of the Four Caliphates on the Politics of Islam in Contemporary Time. African Multidisciplinary Journal of Research, [S. l.], v. 9, n. 2, p. 43–68, 2024. Disponível em: https://journals.spu.ac.ke/index.php/amjr/article/view/407. Acesso em: 21 aug. 2025.