Formulasi dan Optimasi Basis Serum Xanthan Gum dengan Variasi Konsentrasi: Formulation and Optimization of Xanthan Gum Serum Base with Variations of Concentration - Chairunnisa Aprilia; Muhammad Faisal; Fajar Prasetya (Fakultas Farmasi, Universitas Mulawarman, Samarinda, Indonesia, 2022)