Phonrong, W., K. Vithayapat, N. wongwanich, A. Jongjakapun, P. Pinturak, A. Bunloet, and P. Kuhirunyarat. “Proportion of Outpatients That Received Communication Skills from Health Care Providers at General Practice Clinic of a Hospital in Khon Kaen Province”. Srinagarind Medical Journal, vol. 33, no. 5, July 2018, pp. 85-86, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/137097.