Fatimah, Siti, and Rohani Rohani. “Development of Student Worksheets Based on Discovery Learning for Class X Students of Environmental Pollution Materials”. Jurnal Penelitian Pendidikan IPA 8, no. 4 (October 31, 2022): 1806–1813. Accessed April 26, 2024. https://jppipa.unram.ac.id/index.php/jppipa/article/view/2093.