Ketkomol, Pataweekorn, Watchara Chongsa, and Tadsanee Punjanon. 2019. “Qualitative and Quantitative Assessment of Hydroquinone in Skin Whitening Cosmetics in Pathum Thani Province, Thailand”. Journal of Associated Medical Sciences 52 (3):170-74. https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/175445.