Setiawati, Karmila Putri, Agung Lukito, dan Siti Khabibah. “Semiotic Analysis of Formal Operational Students With Field Dependent and Field Independent Cognitive Style in Linear Programming Problem Solving”. Math Didactic: Jurnal Pendidikan Matematika 7, no. 2 (September 11, 2021): 144-158. Diakses Agustus 2, 2025. https://jurnal.stkipbjm.ac.id/index.php/math/article/view/1215.