W. Sirisuwilai, W. . Thangchan, P. . Chouykerd, W. . Sawangsang, and P. . Tantiparnitteerakul, “Is Nong Khai Properly Prepared for Chinese Tourists Arriving on the Lao-China Railway Link? The Research is a Study of Signs at Tourist Spots of Cutural Interest in Nong Khai Province”, dhammathas, vol. 23, no. 2, pp. 191–208, Jun. 2023.