Ketkomol, Pataweekorn, Watchara Chongsa, and Tadsanee Punjanon. “Qualitative and quantitative assessment of hydroquinone in skin whitening cosmetics in Pathum Thani Province, Thailand”. Journal of Associated Medical Sciences 52, no. 3 (August 15, 2019): 170–174. accessed September 11, 2026. https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/175445.