J. Sarasook, R. Suwannatip, K. Sirathanakul, and W. Taiyarach, “Enhancing of Elderly School Quality : A Case Study Sampong Subdistrict, Sri Songkhram District, Nakhon Phanom Province ”, CSD. Res. J., vol. 22, no. 3, pp. 141–158, Dec. 2021.