Juariah, Siti, et al. “Antibacterial Activity of Red Ginger (Zingiber Officinale Var. Rubrum) and Black Turmeric (Curcuma Caesia) Extracts As Growth Inhibitors of Klebsiella Pneumonia: Http: www.doi.org 10.26538 Tjnpr V7i8.14”. Tropical Journal of Natural Product Research (TJNPR), vol. 7, no. 8, Aug. 2023, pp. 3658-65, https://tjnpr.org/index.php/home/article/view/2411.