MANIK, E.; BASTEN SIAGIAN, M. V.; HUTAPEA, J.; PARHUSIP, A.; BATUBARA, P.; SITANGGANG, G.; ULFANI, R. Bimbingan Belajar Gratis Semua Mata Pelajaran Di SMP Swasta HKBP Sidorame. Jurnal Abdimas Mutiara, [S. l.], v. 3, n. 2, p. 64–70, 2022. Disponível em: https://e-journal.sari-mutiara.ac.id/index.php/JAM/article/view/3087. Acesso em: 30 jan. 2026.