Tsaaniyatush Shoolihah Fauzan. Development of Critical Thinking Skills Through Problem-Based Learning Methods in Ushul Fiqh Subject at Madrasah Aliyah Negeri 2 Yogyakarta. Al-Ard [Internet]. 2025 Aug. 20 [cited 2026 May 14];1(3):79-84. Available from: https://mail.al-ard.kjii.org/index.php/i/article/view/14