สุนทรวินิต วชิรญาณ์, and Porntip Shoommuangpak. (2022) 2023. “Guidelines for Service to Create Competitive Advantages of Accounting Firms in The Eastern Region”. Journal of Humanities and Social Sciences Loei Rajabhat University 4 (2). Loei:40-53. https://so01.tci-thaijo.org/index.php/husolru/article/view/257090.