J. Lawalata, Helen, Mariana Rengkuan, and Utari Satiman. 2019. “Antibacterial Activities of Lactic Acid Bacteria from Langsat Fruit (Lansiumdomesticum) Against Phatogenic Bacteria and Spoilage Bacteria”. International Journal of Environment, Agriculture and Biotechnology 5 (6). https://journal-repository.com/index.php/ijeab/article/view/1431.