Soontrapa, Suppasin. “Photosynthesis of Vitaimin D Drom the Skin”. Srinagarind Medical Journal 14, no. 2 (November 21, 2013): 132–137. Accessed April 27, 2024. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/14136.