Chaiear, Naesinee, Sauwanan Bumrerraj, Panida Thanawirattananit, Jamon Ngoencharee, Srinoi Maskasem, Kittisak Sawanyawisuth, and Bangornsri Jindawong. 2013. “Undergraduate students’ Knowledge and Understand of Occupational Medicine at Khon Kaen University”. Srinagarind Medical Journal 21 (4):275-81. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13671.