Sutarman, Sutarman, and Parjiman Parjiman. “The Students’ Character Values Education Based on Ismuba Values and It’s Impact Toward Students in Muhammadiyah School Yogyakarta of Pandemic Covid 19 Era”. Istawa : Jurnal Pendidikan Islam 6, no. 2 (October 22, 2021): 92–108. Accessed April 18, 2026. https://journal.umpo.ac.id/index.php/istawa/article/view/4076.