Udong, Buncha, Pichai Latthasaksiri, Aniruth Phongpaew, Pichai Sapkerd, and Songpol Loppananusorn. 2021. “Factors Affecting the Efficiency of Service in Commercial Affairs of Khao Mai Kaew Subdistrict Administrative Organization Bang Lamung District, Chonburi Province”. Rajapark Journal 15 (43). Bangkok, Thailand:304-14. https://so05.tci-thaijo.org/index.php/RJPJ/article/view/254620.