“Peningkatan Motivasi Belajar Materi Haji, Zakat dan Wakaf Melalui Problem Based Learning Kelas XI SMAN Unggul Harapan Persada”, Validitas, vol. 1, no. 1, pp. 105–121, Mar. 2025, Accessed: Apr. 27, 2025. [Online]. Available: https://journal.maysapublishing.com/index.php/Validitas/article/view/45