Pulungan, Indah Noviyanti Ruhmana, Sugijanto Kartosentono, and Amirudin Prawita. 2018. “Validation Gas Chromatography-Fid Method for Analysis of Ethanol Content in Vinegar”. Journal of Halal Product and Research (JHPR) 1 (2):22-31. https://doi.org/10.20473/jhpr.vol.1-issue.2.22-31.