Dewi, R.; Febriani, A.; Wenas, D. M. Uji Aktivitas Antimikroba Ekstrak Metanol Daun Sirih (Piper Betle L.) Terhadap Pertumbuhan Bakteri Propionibacterium Acnes Dan Khamir Malassezia Furfur: Antimicrobial Activity Of Methanolic Extract Of Betel Leaf (Piper Betle L.) Against The Growth Of Propionibacterium Acnes Bacteria and Malassezia Furfur Yeast. Sainstech Farma 2019, 12, 32-38.