Siregar, Nirmala Santy, and Paidi Paidi. “Effectiveness of Problem-Based Research Skill Development Flipped-Classroom E-Module for Critical Thinking and Scientific Literacy”. Jurnal Pendidikan Matematika dan Sains 14, no. 1 (February 28, 2026): 281–293. Accessed March 29, 2026. https://jurnal.uny.ac.id/index.php/jpms/article/view/95083.