Katu, Hafsah, et al. “Inhibitory Concentration and Minimum Contact Time Gambir Extract (Uncaria Gambier Roxb) Against Bacterial Growth Enterococcus Faecalis”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 27, no. 3, June 2016, pp. 239-46, https://gssrr.org/JournalOfBasicAndApplied/article/view/5912.