Qomariyah, A., & 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), 427–437. Retrieved from https://edujavare.com/index.php/jcpa/article/view/1645