Seran, Kanisiana Abuk, A.A. Sujadi, and Irham Taufiq. “Pengaruh Model Pembelajaran Kooperatif Tipe Group Investigation (GI) Terhadap Hasil Belajar Matematika Siswa SMP”. Union : Jurnal Ilmiah Pendidikan Matematika 8, no. 1 (March 20, 2020): 33–40. Accessed September 25, 2022. https://jurnal.ustjogja.ac.id/index.php/union/article/view/5069.