Purwoto, Asep Dwi, Suharno Suharno, and Sukarmin Sukarmin. “Development of A Problem-Based Physics E-Module With A Flipped Classroom Approach Using Sigil Software As An Alternative Learning Media During the COVID-19 Pandemic”. Jurnal Penelitian Pendidikan IPA 8, no. 2 (April 30, 2022): 911–917. Accessed November 22, 2024. https://jppipa.unram.ac.id/index.php/jppipa/article/view/1198.