“Penalaran Proporsional Siswa Kelas Menengah dalam Menyelesaikan Masalah Matematika Ditinjau dari Adversity Quotient : Proportional Reasoning of Middle School Students in Solving Mathematical Problems Viewed From Adversity Quotient” (2020) Pedagogia : Jurnal Pendidikan, 9(1), pp. 67–80. doi:10.21070/pedagogia.v9i1.259.