Formulation Of Ointment From Extract Combination Of Lemongrass (Cymbopogon nardus L. Rendle), Green Betel Leaf (Piper betle L.) And Natural Zeolite As An Antibacterial Agent. (2020). Jurnal Biota, 6(2), 92-99. https://doi.org/10.19109/10.19109/Biota.v6i2.6363