Amaliana, A.; Nasution, H. M.; Lubis, M. S.; Rahayu, Y. P. Formulation and Testing of Antibacterial Activity of Liquid Soap Preparations Ethanol Extract of Arabika Coffee Leaves (Coffea Arabica L.) Against the Bacteria Staphylococcus Aureus. JPS 2025, 8, 882-892.