ZAYYIN, A. MENINGKATKAN KEAKTIFAN DAN HASIL BELAJAR MATEMATIKA DENGAN MODEL PEMBELAJARAN KOOPERATIF TIPE GROUP INVESTIGATION. Union : Jurnal Ilmiah Pendidikan Matematika, [S. l.], v. 5, n. 1, p. 11–20, 2017. DOI: 10.30738/.v5i1.935. Disponível em: https://jurnal.ustjogja.ac.id/index.php/union/article/view/935. Acesso em: 6 oct. 2022.