Supian, K., I. F. Muhammad Yunus, A. Ahmad, and R. K. Abdul Rauf. “Tourism Risk Factors and Tourist’s Satisfaction With Halal Products and Services”. Selangor Business Review, Vol. 7, no. 1, June 2022, pp. 1-17, https://sbr.journals.unisel.edu.my/ojs/index.php/sbr/article/view/99.