Chantarach, W., and C. Changssomchai. “The Service Quality of the Cadastral Surveyors of KhonKaen Provincial Land office Namphong Branch”. Dhammathas Academic Journal, vol. 18, no. 3, Dec. 2018, pp. 205-14, https://so06.tci-thaijo.org/index.php/dhammathas/article/view/136050.