SITUMORANG, Marlon. PENINGKATAN HASIL BELAJAR SIFAT-SIFAT SEGIEMPAT DENGAN PENDEKATAN STAD (STUDENT TEAMS ACHIEVEMENT DIVISIONS) DI KELAS VII-1 SMP NEGERI 2 SORKAM. JURNAL HANDAYANI PGSD FIP UNIMED, [S. l.], v. 3, n. 1, 2015. DOI: 10.24114/jh.v3i1.2174. Disponível em: http://103.242.233.34/index.php/handayani/article/view/2174. Acesso em: 31 jan. 2025.