Preparasi Mikrosfer Fraksi Etil Asetat Herba Sambiloto (Andrographis paniculata Nees) dengan Metode Semprot Kering (The Preparation of Ethyl Acetate Fraction Microspheres of Sambiloto Herbs (Andrographis paniculata Nees) Using Spray Drying Method) (Jurnal Ilmu Kefarmasian Indonesia FF Universitas Pancasila, 2012)