Sovfan, Rangga Firdaus, Dina Martha Fitri. Improving Learning Activity and Concept Mastery in Physics for 12th Grade Students Using a Virtual Lab (PhET Simulation). ITLJ [Internet]. 2025 Dec. 18 [cited 2025 Dec. 22];9(2):407-16. Available from: https://itlj.utm.my/index.php/itlj/article/view/200