Sundari, H., Prabowo, M.H., Rachmawaty, F.J. and Tamhid, H.A. 2016. Standardization of leaf extract of red betel(Piper crocatum) leaves using ethanol. JKKI : Jurnal Kedokteran dan Kesehatan Indonesia. 7, 1 (Jan. 2016), 3–9. DOI:https://doi.org/10.20885/JKKI.Vol7.Iss1.art2.