Ingan Ukur Br Sitepu, Menanti Sembiring, Permikaria Br Ginting, Alpina Darmayanti Br Sitepu. Disiplin Kerja Tentor Pada Bimbingan Belajar Excellent Brain (e-Brain) Kabanjahe, Kecamatan Kabanjahe, Kabupaten Karo. Joong-Ki [Internet]. 2024 Nov. 2 [cited 2025 Oct. 18];4(1):16-22. Available from: https://ulilalbabinstitute.id/index.php/Joong-Ki/article/view/5542