Manasikana OA, Hayati N, Af’idah N, Rasyidi M. Implementation of Project-Based Learning: Utilizing Natural Rocks as Waste Absorbents. HJKK [Internet]. 2023 Apr. 28 [cited 2025 Nov. 21];11(2):139-48. Available from: https://ojspanel.undikma.ac.id/index.php/hydrogen/article/view/7423