Azriyanti, Riza, and Syafriani. “Validation of the Physics E-Module Based on Problem Based Learning As Independent Teaching Material to Improve Critical Thinking Skills of Class XI High School Students ”. Jurnal Penelitian Pendidikan IPA 9, no. 11 (November 25, 2023): 10223–10229. Accessed September 3, 2024. https://jppipa.unram.ac.id/index.php/jppipa/article/view/5809.