Mirah, L., E. Girsang, A. N. Nasution, and I. N. E. . Lister. “Antioxidant and Tyrosinase Enzyme Inhibition Activity of Lime Peel and Seed Ethanol Extract”. American Scientific Research Journal for Engineering, Technology, and Sciences, vol. 63, no. 1, Jan. 2020, pp. 87-93, https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/5491.