Monica, S., and Z. Husna. “Antibacterial Activity Test of (+)- Katekin and Gambir (uncaria Gambier roxb.) Against Some Types of Grambled Bacteries Negative Bacteria and Their Mechanism”. International Journal on Health and Medical Sciences, vol. 1, no. 1, Dec. 2022, pp. 29-37, https://journals.iarn.or.id/index.php/HealMed/article/view/26.