Reza, Ahmad Khairul, Annisah Rahajeng K S, Sejahtera Ahmad, Intan Nurhasanah, and Akhiruddin Maddu. 2017. “Design of Portable Ethanol Testing Device for Halal Verification of Alcoholic Beverages”. Asian Journal of Applied Sciences 5 (5). https://www.ajouronline.com/index.php/AJAS/article/view/4997.