Qomariyah, Aisatul, and Samheri. 2026. “The Validity of Sale and Purchase Contracts in the Al-Mujtama’ Islamic Boarding School, Pamekasan: A Study Based on Imam Al-Shafi’i’s Al-Umm”. Journal of Creative Power and Ambition (JCPA) 4 (02):427-37. https://edujavare.com/index.php/jcpa/article/view/1645.