Phramaha Chatthep Phutthachato, Saipin Rungwattanakit, & Saisamorn Vittayasiri. (2023). The development of English communication skills for tourism in the cultural sites of Phrae Province. Journal of Lanna Societies, 1(3), 21–30. retrieved from https://so13.tci-thaijo.org/index.php/jls/article/view/311