Ishak, Khodijah, Akhmad Afandi Mahfudz, Yuswar Zainul Basri, Tatik Mariyanti, and Zulhelmy Zulhelmy. 2020. “Strengthening Halal Tourism Development in Riau Province in Indonesia”. International Journal of Islamic Business 5 (2): 72-82. https://doi.org/10.32890/ijib2020.5.2.5.