Maulidya, Maulidya, et al. “Optimasi Formula Spray Gel Ekstrak Bawang Tiwai (Eleutherine Americana (Aubl) Merr)”. Proceeding of Mulawarman Pharmaceuticals Conferences, vol. 11, no. 1, Feb. 2020, pp. 11-16, doi:10.25026/mpc.v11i1.386.