Novriani, Milda Rizky, and Edy Surya. “Analysis of Student Difficulties in Mathematics Problem Solving Ability at MTs SWASTA IRA Medan”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 33, no. 3 (May 25, 2017): 63–75. Accessed September 19, 2025. https://gssrr.org/JournalOfBasicAndApplied/article/view/7437.