Saprudin, S., Tomia, A., Muhammad, N., Rahman, N. A., Hamid, F., & Sahjat, S. (2023). The Mobile Apps Development of Simple Machine Content to Improve Learning Achievement of Junior High School Students. Technium Social Sciences Journal, 40(1), 107–116. https://doi.org/10.47577/tssj.v40i1.8340