Purnawan, Rochadi Arif. “Increasing Biology Learning Result With Cooperative Learning Type Student Teams Achievement Division (STAD)”. Biosfer: Jurnal Pendidikan Biologi 7, no. 1 (January 23, 2018): 58-63. Accessed April 28, 2024. https://journal.unj.ac.id/unj/index.php/biosfer/article/view/5665.