Wita Ferwati, Abdul Hasan Saragih, Harun Sitompul. “Understanding and Interpreting the Problem-Based Learning Model Based on Blended Learning in High School Learning”. International Journal of Special Education 41, no. 17s (August 11, 2026): 911–919. Accessed October 24, 2026. https://mail.internationalsped.com/index.php/ijse/article/view/5335.