Harahap, Iswandi, Abdul Salam @ Zulkifli Muhamad Shukri, Mohammad Aizat Jamaludin, and Norazah Mohammad Nawawi. “The Concept Of Taḥawwul As A Determinant For Ruling Of Halal For Food And Beverages Produced Through Fermentation Process”. al-Qanatir: International Journal of Islamic Studies 17, no. 1 (January 7, 2020): 29-39. Accessed February 26, 2020. http://al-qanatir.com/index.php/qanatir/article/view/236.