Reubun, Y. A., S. Kumala, S. Setyahadi, and P. Simanjuntak. “Pengeringan Beku Ekstrak Herba Pegagan (Centella asiatica): Freeze Drying Method of Pegagan (Centella Asiatica) Extract”. Sainstech Farma: Jurnal Ilmu Kefarmasian, vol. 13, no. 2, Sept. 2020, pp. 113-7, doi:10.37277/sfj.v13i2.764.