Kumalasari, D., Junaedi, I. and Susilo, B. (2017) “KECEMASAN MATEMATIK SISWA KELAS XI SMK BERDASARKAN MAHMOOD DAN KHATOON DALAM SETTING PROBLEM BASED LEARNING”, Unnes Journal of Mathematics Education, 5(3), pp. 250-256. doi: 10.15294/ujme.v5i3.11476.