Simanullang, Aprillia Anggita, Kartini, and Titi Solfitri. “Development of a Test Instrument to Measure Mathematical Communication Skills on the Topics of Three-Variable Linear Equations and Two-Variable Linear Inequalities”. Jurnal Absis: Jurnal Pendidikan Matematika dan Matematika 8, no. 1 (April 29, 2025): 94–104. Accessed December 17, 2025. https://ojs-staging.upp.ac.id/index.php/absis/article/view/2745.