Nadrah, Nadrah. “Linear Motion Materials on Authentic Learning in Collaborative Problem-Solving Model: Validity Aspects”. Jurnal Penelitian Pendidikan IPA 9, no. 11 (November 25, 2023): 10067–10076. Accessed August 29, 2025. https://jppipa.unram.ac.id/index.php/jppipa/article/view/5587.