Nurrahmah N, , Darsikin,D, Kade A. Model Penalaran Matematika Formal Siswa Dalam Memecahkan Masalah Fisika. mitrasains [Internet]. 30May2019 [cited 16Oct.2024];7(2):205-14. Available from: http://103.245.72.41/index.php/MitraSains/article/view/285