*, Rosita, Hasratuddin *, and Tian Abdul Aziz. “Ability Solving Problem And Think Critical Mathematical Through Problem Based Flipped Classroom Help Videos”. IJO - International Journal of Mathematics (ISSN: 2992-4421 ) 6, no. 07 (July 31, 2023): 01-09. Accessed October 12, 2025. https://ijojournals.com/index.php/m/article/view/684.