Setiawati KP, Lukito A, Khabibah S. Semiotic analysis of formal operational students with field dependent and field independent cognitive style in linear programming problem solving. Math Didactic [Internet]. 11 September 2021 [dikutip 2 Agustus 2025];7(2):144-58. Tersedia pada: https://jurnal.stkipbjm.ac.id/index.php/math/article/view/1215