“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.