Fitriyana Fitriyana, Anna Fitriawati and Annie Rahmatillah (2026) “Physical Quality Test And Antibacterial Activity Of Anti-Acne Cream Preparation Of Neem Leaf Extract (Azadirachta Indica A.Juss) Against Propionibacterium Acnes”, International Journal of Health Engineering and Technology, 5(1). doi: 10.55227/ijhet.v5i1.675.