Tengku Zawaw, T. N. S. i, M. D. Muhamad, and A. H. Ishak. “Hisbah and Quality Assurance: Learning from Islamic Golden Age Heritage”. Online Journal of Research in Islamic Studies, vol. 6, Nov. 2019, pp. 25-36, https://jati.um.edu.my/index.php/RIS/article/view/20795.