Karakteristik Dan Stabilitas Sediaan Gel Mulut Berbahan Aktif Ekstrak Daun Sirih Hitam Berbasis Hydroxy Ethyl Cellulose (HEC). J. Trop. Pharm. Chem 2013, 2 (2), 83-90. https://doi.org/10.30872/jtpc.v2i2.64.