Ayu Sibagariang, Muhammad Andre Reynaldi and Rony Sitohang 2023. Antibacterial Activity of Crude Ethanolic Leaves Extract of Artocarpus heterophyllus Lam. Cultivated in Toba Region against Staphylococcus aureus. International Journal of Health Engineering and Technology (IJHET). 1, 5 (Jan. 2023). DOI:https://doi.org/10.55227/ijhet.v1i5.99.