Shamsuddin, S., O. Eng Tek, and S. Desa. “Effects of Based LearningIssue of Achievement BiologyAmong Form Four Students (49 - 60)”. Jurnal Pendidikan Sains Dan Matematik Malaysia, vol. 2, no. 2, Apr. 2019, pp. 49-60, https://ojs.upsi.edu.my/index.php/JPSMM/article/view/1822.