เข็มทอง สุรีย์, and งามวิชัยกิจ อโณทัย. 2018. “Hospitality Potential Development of Working Staff in Small Sized Hotel: A Study of Hotels in Loei Province”. Journal of Business Administration The Association of Private Higher Education Institutions of Thailand 7 (1). Bangkok, Thailand:38-53. https://so02.tci-thaijo.org/index.php/apheitvu/article/view/126829.