Habibbulloh, Muhammad. “EFFECTIVENESS OF THE GUIDED DISCOVERY MODEL BASED VIRTUAL LAB PhET TOWARD MASTERY STUDENTS’ CONCEPT ON TOPIC PHOTOELECTRIC EFFECT”. Science Education and Application Journal 1, no. 1 (April 9, 2019): 1–9. Accessed May 2, 2024. https://jurnalpendidikan.unisla.ac.id/index.php/SEAJ/article/view/100.