Bahtiar, B, and Nurhayati Dukomalamo. “Basic Science Process Skills of Biology Laboratory Practice: Improving through Discovery Learning”. Biosfer: Jurnal Pendidikan Biologi 12, no. 1 (April 29, 2019): 83-93. Accessed December 15, 2019. http://journal.unj.ac.id/unj/index.php/biosfer/article/view/10397.