Situmorang, Hannah, Antonius Remigius, Rumiris Lumban Gaol, and Patri Silaban. “PENGARUH REWARD DAN PUNISHMENT TERHADAP HASIL BELAJAR MATEMATIKA SISWA KELAS III SD HKBP ”. Jurnal Educatio FKIP UNMA 6, no. 2 (November 25, 2020): 278–281. Accessed June 17, 2025. https://www.ejournal.unma.ac.id/index.php/educatio/article/view/442.