SITUMORANG, R.; PRASETIA, I. The Effect of Peer Tutor Method on Learning Outcomes Mathematics at Private Junior High School PTPN 4 Mayang. EDUCTUM: Journal Research, [S. l.], v. 1, n. 1, p. 25–30, 2022. DOI: 10.56495/ejr.v1i1.263. Disponível em: https://jurnal.larisma.or.id/index.php/EJR/article/view/263. Acesso em: 5 jul. 2025.