Badruldin, Nurul Aufa, and Siti Nursaila Alias. “Level of Conceptual Understanding Among Secondary Students on Topic of Forces and Motion Using Half-Length Force Concept Inventory (HFCI)”. ICCCM Journal of Social Sciences and Humanities 1, no. 2 (April 21, 2022): 12–20. Accessed February 23, 2025. https://ejicccm.com/index.php/icccmjssh/article/view/5.