Chaiear, N., S. Bumrerraj, P. Thanawirattananit, J. Ngoencharee, S. Maskasem, K. Sawanyawisuth, and B. Jindawong. “Undergraduate students’ Knowledge and Understand of Occupational Medicine at Khon Kaen University”. Srinagarind Medical Journal, vol. 21, no. 4, Nov. 2013, pp. 275-81, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13671.