Akib, S. N. “Green Tea Polyphenols’ Benefit As Chemopreventive Agent of Skin Cancer Due To Chronic Exposure of UVB Rays”. Jurnal Medika Hutama, Vol. 2, no. 01 Oktober, Oct. 2020, pp. 421-8, http://jurnalmedikahutama.com/index.php/JMH/article/view/105.