Kamarul Zaman MA. Sah (الصحة) dan Batal (البطلان) Menurut Ulama Usul Fiqh: Validity and Invalidity According to Scholars of Islamic Jurisprudence Principle. PERS. 2017;9(3):116-124. Accessed December 6, 2025. https://ejournal.upsi.edu.my/index.php/PERS/article/view/1772