Maryono. “Proses Berpikir Mahasiswa Dalam Menyelesaikan Masalah Berstandar PISA (Programme for International Student Assessment)”. Journal of Education and Learning Mathematics Research (JELMaR), vol. 1, no. 1, May 2020, pp. 1-14, https://jelmar.wisnuwardhana.ac.id/index.php/jelmar/article/view/39.