Uji Daya Hambat Formula Gel Ekstrak Etanol Daun Murbei (Morus alba L.) Sebagai Anti Acne Terhadap Bakteri Propionibacterium acne.: Inhibition Test of Ethanol Extract Gel of Mulberry (Morus alba L.) Leaves as an Anti Acne on Propionibacterium acne Bacteria - Aliah, Ahmad Irsyad (Universitas Tadulako, 2019)