Sudrajat, Sudrajat, et al. “PEMBINAAN OLIMPIADE SAINS NASIONAL (OSN) BIDANG STUDI MATEMATIKA DI SMP ISLAM TA’ALLUMUL HUDA BUMIAYU”. Jurnal Pengabdian Masyarakat : BAKTI KITA, vol. 6, no. 2, Oct. 2025, pp. 39-48, doi:10.52166/baktikita.v6i2.10059.