QOMARIYAH, Aisatul; SAMHERI. 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), [S. l.], v. 4, n. 02, p. 427–437, 2026. Disponível em: https://edujavare.com/index.php/jcpa/article/view/1645. Acesso em: 13 sep. 2026.