M. Ahda, F. Fiqrirozi, G. N. Habibah, M. U. Lestari, T. Hardianto, and Y. Andriani, “Optimation Of Ethanol Extract Of Centella Asiatica And Cresintia Cujete Composition As Natural Antioxidant Source”, EKSAKTA: J. Sci. Data Anal., vol. 16, no. 1, pp. 9–16, Mar. 2016.