Sukmawati, Klara Iswara. “The Implementation of Progressive Mathematization Model As a Mean to Enhance Understanding and Communication Ability of Junior High School Students”. Jurnal Riset Pendidikan Matematika 5, no. 1 (May 24, 2018): 30–42. Accessed May 18, 2025. https://journal.uny.ac.id/index.php/jrpm/article/view/16056.