Pugtarmnag, Sooksanti, Ngamjit Pranate, Yongyut Thitininniti, and Kamolnat Muangyim. 2019. “How to Build a Seamless Referral System: A Case Study of Tha Chang Community Hospital, Sing Buri, Thailand”. JOURNAL OF HEALTH SCIENCE RESEARCH 13 (1), 136-46. https://www.tci-thaijo.org/index.php/JHR/article/view/199990.