HOLDEN SIMBOLON, Dedi; KARTIKA SILALAHI, Eka; PARNINGOTAN PURBA, Joen; PERBINA, Theresia; KRISTIANI RAJAGUKGUK, Mery. Pendampingan Belajar Matematika Bagi Anak-Anak Di Panti Asuhan Medan Indonesia. AMMA : Jurnal Pengabdian Masyarakat, [S. l.], v. 2, n. 9 : Oktober, p. 1170–1173, 2023. Disponível em: https://journal.mediapublikasi.id/index.php/amma/article/view/3700. Acesso em: 7 dec. 2025.