Luthfiyani, Fikriyah, and Iwan Permana Suwarna. “A Counterbalanced Quasi-Experiment Comparing Problem-Based Learning With Zep Quiz, Zep Quiz Alone, and Traditional Lecture on Critical Thinking in High School Mechanics”. Jurnal Penelitian Ilmu Pendidikan 19, no. 1 (May 22, 2026). Accessed May 24, 2026. https://journal.uny.ac.id/index.php/jpip/article/view/97460.