Ghofur, A., B. Jatmiko, and I. G. M. Sanjaya. “Profile of High School Students’ Problem-Solving Skills and the Application of Problem-Based Learning: A Preliminary Study”. Studies in Learning and Teaching, Vol. 4, no. 3, Dec. 2023, pp. 522-36, doi:10.46627/silet.v4i3.317.