Mattahari, Warsidah, and M. A. . Wibowo. “Isolation and Analysis of Essential Oils From Bangle (Zingiber Purpureum Rosc.) Rhizome”. The Journal of Food and Medicinal Plants, vol. 1, no. 2, Dec. 2020, http://jfmp.lppm.unand.ac.id/index.php/jfmp/article/view/10.