Elfira Jumrah and Rosmaniar 2023. Liquid Soap Formulation of Lahuna Leaf Extract (Eupatorium odoratum) and Betel Leaf Extract (Piper betle L.) and Activity Tests Against Escherichia coli. Al-Kimia. 11, 1 (Jun. 2023). DOI:https://doi.org/10.24252/al-kimia.v11i1.34386.