Fuadi, Husnul, Gunawan Gunawan, and Susilawati Susilawati. “Feasibility of PBL (Problem Based Learning)-Based Sound Wave Electronic Student Worksheet for High School Students Using the Liveworksheet Application”. Jurnal Penelitian Pendidikan IPA 8, no. 4 (October 31, 2022): 1961–1971. Accessed July 4, 2024. https://jppipa.unram.ac.id/index.php/jppipa/article/view/1982.