Boonyopakorn , Jaemjan. 2022. “AN IMPROVEMENT ON COMMUNICATIVE ENGLISH SKILLS OF TOURISM ENTREPRENEURS TO RAISE NEW NORMAL TOURISM SERVICES BY APPLICATION ON SMARTPHONE”. Journal of Liberal Art of Rajamangala University of Technology Suvarnabhumi 4 (2):402-12. https://so03.tci-thaijo.org/index.php/art/article/view/259986.