Uji In Vitro Efek Ekstrak Etanol Biji Kakao (Theobroma cacao) sebagai Antibakteri terhadap Propionibacterium acnes (In Vitro Test of the Effect of Cocoa Beans (Theobroma cacao) Ethanolic Extract as an Antibacterial against Propionibacterium acnes) - Aida, Ariska Nur (UPT Penerbitan Universitas Jember, 2016)