Indriani, Luluk, et al. “The Tradition of Sunnah Fasting in Forming Self-Discipline for Students at the Darussalam Simpang Mesir Islamic Boarding School”. Bulletin of Pedagogical Research, vol. 6, no. 2, Aug. 2026, pp. 127-41, doi:10.51278/bpr.v6i2.2179.