Octavianna, yessy octavianna, Jelita Pakpahan, and Usman Sidabutar. “Problem Based Learning’s Effect in Understanding of Idioms Found on Agatha Christine’s Novel at SMAN 1 Onanrunggu”. Eduscape : Journal of Education Insight 2, no. 3 (July 23, 2024): 150–171. Accessed November 8, 2025. https://journal.idscipub.com/index.php/eduscape/article/view/254.