Santisetthsin, Phatchamon, and Chuanchom Thananithisak. 2015. “Public and Community Pharmacist Opinions Toward the Control Measure of Tramadol Drug Dispensing”. Srinagarind Medical Journal 29 (6):559-66. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/31590.