Tungsateanrapap, W., P. Rengpinit, and T. Phongtong. “Surveying of Drug Information Desire and Information Source in (Public) Hospitals in Khan Kaen Province”. Srinagarind Medical Journal, vol. 13, no. 1, Nov. 2013, pp. 24-29, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/14077.