Purwanto, Ari, and Abdul Mufid. “The Contribution of Caliph Abu Bakar As-Shidiq at the Beginning of the Caliphate of Rashidah”. East Asian Journal of Multidisciplinary Research 3, no. 5 (May 27, 2024): 1697–1708. Accessed April 29, 2026. https://journal.formosapublisher.org/index.php/eajmr/article/view/9035.