Ariyanti R, Ferita RA, Hidayat F. Analysis of understanding mathematics concepts of junior high school students on the subject of coordinate systems. Math Didactic [Internet]. 30 Desember 2021 [dikutip 1 Juli 2025];7(3):245-58. Tersedia pada: https://jurnal.stkipbjm.ac.id/index.php/math/article/view/1319