Laddawan Vongtum, Yupaporn Yupas, Phakdee Phosing, Saovalak Kosonkittiumporn and Sanya Kenaphoom, “Service Innovation According to Public Policy of Local Government Organizations in the Northeast”, Annals of RSCB, vol. 25, no. 6, pp. 10391–10397, Jun. 2021.