Chaivanit, H., Meesri, J., Meethong, S., & Anatasinkul, N. (2017). Proficiency Testing for ASEAN Member Countries in Analyzing Hydroquinone in Facial Creams, 2011. Journal of Health Science of Thailand, 23(1), 121–129. Retrieved from https://thaidj.org/index.php/JHS/article/view/626