Haryadi, Rudi, and Heni Pujiastuti. “Discovery Learning Based on Natural Phenomena to Improve Students’ Science Process Skills”. Jurnal Penelitian & Pengembangan Pendidikan Fisika 5, no. 2 (December 28, 2019): 183 - 192. Accessed April 21, 2025. http://103.8.12.212:33180/unj/index.php/jpppf/article/view/12756.