Gurning, Kasta, and dan Hilda Sinaga. “Characterization and Screening of Phytochemical Secondary Metabolite of Seri (Muntingia Calabura, L) Leaves Which Is Potential As an Anti-Diabetic Based on Indonesian Herbal Medicine Standard”. Journal of Drug Delivery and Therapeutics, vol. 10, no. 6-s, Dec. 2020, pp. 92-94, https://doi.org/10.22270/jddt.v10i6-s.4458.