Widayat, W., M. S. Pradana, and M. Ardana. “Effect of Media Types on the Growth of Callus Culture in Kumis Kucing Orthosiphon Aristatus (Blume) Miq”. Journal of Tropical Pharmacy and Chemistry, vol. 5, no. 1, June 2020, pp. 21-28, doi:10.25026/jtpc.v5i1.210.