Suengthavorn, T., and P. Kerdnaimongkol. “Effects of Good Manufacturing Practice (GMP) on Sealed Drinking Water Factories in Rayong Province”. Journal of Health Science of Thailand, vol. 17, no. Sup.7, Dec. 2018, pp. SVII2141-2150, https://thaidj.org/index.php/JHS/article/view/5397.