Saprudin, Saprudin, Amalia Tomia, Nurlaela Muhammad, Nurdin Abdul Rahman, Fatma Hamid, and Sumarni Sahjat. 2023. “The Mobile Apps Development of Simple Machine Content to Improve Learning Achievement of Junior High School Students”. Technium Social Sciences Journal 40 (1). Constanta, Romania:107-16. https://doi.org/10.47577/tssj.v40i1.8340.