Lalu, M., 		Nursamsiar, N., 		Muslimin, L., & 		Gani, S.
(2017).
 Sunscreen Activing of Purple Sweet Potato (Ipomoea batatas L.) Using Spectrophotometry Method.
<em>Journal Of Pharmaceutical And Medicinal Sciences, 2</em>(1).
Retrieved from <a href="https://www.jpms-stifa.com/index.php/jpms/article/view/39" target="_new">https://www.jpms-stifa.com/index.php/jpms/article/view/39</a>