Mustika, Rekma. “Hubungan Self Confidence Dan Adversity Quotient Terhadap Kemampuan Pemecahan Masalah Matematik Siswa”. Jurnal Penelitian Pendidikan 18, no. 2 (August 24, 2018): 220–230. Accessed August 1, 2026. https://ejournal-dppm.upi.edu/jpp/article/view/476.