Andrean, Rizky, and Hendri Hermawan Adinugraha. “Competency Problems of Halal Slappers In Indonesia: A Literature Study”. Al-Muamalat Jurnal Hukum dan Ekonomi Syariah 6, no. 1 (June 30, 2021): 1 - 13. Accessed April 21, 2026. https://dev-journal.iainlangsa.ac.id/index.php/muamalat/article/view/3525.