PRATAMA, Y. A. The Five Main Values of Strengthening Character Education (PPK) in Umar bin Khattab. Journal of Contemporary Islamic Education, [S. l.], v. 2, n. 2, p. 198–216, 2022. DOI: 10.25217/jcie.v2i2.2599. Disponível em: https://www.journal.iaimnumetrolampung.ac.id/index.php/cie/article/view/2599. Acesso em: 8 aug. 2025.