สุโขทัย อ., สายจำปา ธ., and โรจนพล ว., “Effects of Urbanization Changing on Roles of Subdistrict Headman and Village Headman in Phra Pradaeng District, Samutprakan Province”, JITI, vol. 18, no. 1, pp. 121–129, Jun. 2019.