Ramayani, Septiana Laksmi, et al. “The Effect of Kitolod (Isotoma Longiflora) Leaf Extract Concentration in Gel Formula on Total Phenolic and Flavonoid Levels”. Jurnal Kesehatan Dr. Soebandi, vol. 12, no. 1, Apr. 2024, pp. 32-38, doi:10.36858/jkds.v12i1.573.