Pongpunna, S., N. Jarernsiripornkul, and T. Pratipanawatr. “Attitude towards Usefulness of Patient Information Leaflets Among Ambulatory Patients”. Srinagarind Medical Journal, vol. 33, no. 4, June 2018, pp. 351-8, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/130300.