Putri F, Haniyah D, Rahmawati W. Validitas Angket Self-Confidence Peserta Didik Menengah pada Pembelajaran Matematika. mathedu [Internet]. 18Feb.2022 [cited 5May2024];2(1):170-83. Available from: https://ojs3.unpatti.ac.id/index.php/mathedu/article/view/5224