Maryono. (2020). Proses Berpikir Mahasiswa Dalam Menyelesaikan Masalah Berstandar PISA (Programme for International Student Assessment). Journal of Education and Learning Mathematics Research (JELMaR), 1(1), 1-14. https://jelmar.wisnuwardhana.ac.id/index.php/jelmar/article/view/39