L. Cia, R., & Salih, M. (2015). Problem Solving Confidence and Attitudes in Mathematics of Grade Six Pupils of Sawata Ernandcor Central Elementary School. Jurnal Pendidikan Sains Dan Matematik Malaysia, 5(1), 35–43. Retrieved from https://ejournal.upsi.edu.my/index.php/JPSMM/article/view/2141