Ishak, K., Mahfudz, A. A., Basri, Y. Z., Mariyanti, T., & Zulhelmy, Z. (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